Experience of Such Purchaser. Such Purchaser, either alone or together with its representatives, has such knowledge, sophistication and experience in business and financial matters so as to be capable of evaluating the merits and risks of the prospective investment in the Securities, and has so evaluated the merits and risks of such investment. Such Purchaser is able to bear the economic risk of an investment in the Securities and, at the present time, is able to afford a complete loss of such investment.

Investment Experience. ​ is an investor in speculative securities with companies that have no revenue or profits and lack liquidity and capital resources and has such knowledge, sophistication and experience in business and financial matters as to be capable of evaluating the risks of the investment in the Shares. ​ confirms that he is able to bear the economic risk of an investment in the Shares and is able to afford a complete loss of such investment.

Investment Experience. Buyers understand that purchase of the Control Shares involves substantial risk. Buyer:

Investment Experience. The Seller is able to fend for itself and has sufficient knowledge and experience in financial and business matters, including disposing of the Purchased Shares, and is capable of evaluating the merits and risks of the transactions contemplated hereunder. The sale and delivery of the Purchased Shares hereunder is for its own account, and the Seller has independently and without reliance upon the Purchaser or any representative of the Purchaser and based on such information as the Seller has deemed appropriate in its independent judgment, made its own analysis and decision to sell the Purchased Shares pursuant to this Agreement.

Investment Experience. Holder understands that the purchase of this Warrant and its underlying securities involves substantial risk. Holder has experience as an investor in securities of companies in the development stage and acknowledges that Holder can bear the economic risk of such Holder’s investment in this Warrant and its underlying securities for an indefinite period of time, and has such knowledge and experience in financial or business matters that Holder is capable of evaluating the merits and risks of its investment in this Warrant and its underlying securities and/or has a preexisting personal or business relationship with the Company and certain of its officers, directors or controlling persons of a nature and duration that enables Holder to be aware of the character, business acumen and financial circumstances of such persons.

Investment Experience. Such Investor is an investor in securities of companies in the development stage and acknowledges that it can bear the economic risk of its investment and has such knowledge and experience in financial or business matters that it is capable of evaluating the merits and risks of the investment in the Securities. If other than an individual, such Investor also represents it has not been organized solely for the purpose of acquiring the Securities.

Duties of Purchaser. During the term of this Agreement, Purchaser shall have the following authority, duties and responsibilities as they pertain to the Operating Systems:

c/o ​

Purchaser Demand Rights. On or after ​ and prior to ​, the BlackRock Purchaser (on behalf of itself and any other Holders) shall have the right to dispose of Registrable Securities under a Registration Statement pursuant to an Underwritten Offering if the BlackRock Purchaser reasonably expects (for itself and/or any other Holders) # gross proceeds of at least ​ from such Underwritten Offering or # gross proceeds of at least ​ from such Underwritten Offering and such Registrable Securities represent 100% of the then-outstanding Registrable Securities held by the BlackRock Purchaser and any applicable Selling Holder. The BlackRock Purchaser (on behalf of itself and any other Holders) shall exercise its demand registration right by delivering a written notice to the Partnership specifying that # it is exercising a demand registration right, # the name of each Selling Holder, and # the amount of Registrable Securities to be included in the Underwritten Offering. Promptly upon receipt of the written notice, the Partnership shall enter into an underwriting agreement in a form that is customary in Underwritten Offerings of securities by the Partnership with the Managing Underwriter or Underwriters selected by the Partnership, which shall include, among other provisions, indemnities to the effect and to the extent provided in [Section 2.08], and shall take all such other reasonable actions as are requested by the Managing Underwriter or Underwriters in order to expedite or facilitate the disposition of such Registrable Securities; provided, however, the BlackRock Purchaser shall have the right (on behalf of itself and the other Holders) to exercise the demand registration rights set forth in this [Section 2.03] not more than three times (and not more frequently than once in any twelve-month period), and only in the event that either the Partnership has not conducted an Underwritten Offering of Common Units in the preceding twelve-month period in which the BlackRock Purchaser (on behalf of itself or other Holders) was eligible to exercise piggyback registration rights pursuant to [Section 2.02] or, if the Partnership has conducted such an Underwritten Offering, the BlackRock Purchaser (on behalf of itself or other Holders) has been reduced in the amount of Registerable Securities included in such offering pursuant to [Section 2.02(b)] by 25% or more of the Included Registrable Securities; provided, further, the aggregate amount of Registerable Securities that may be included in an Underwritten Offering pursuant to a demand registration right exercised pursuant to this [Section 2.03] shall not exceed one-third of aggregate number of Registrable Securities outstanding as of the latest Closing Date (or such larger number of Registrable Securities to the extent consented to by the Partnership in its sole and absolute discretion); provided, further, that if the Partnership or any of their respective Affiliates # is conducting or actively pursuing a merger, acquisition or disposition transaction with a third party, # is conducting or actively pursuing a securities offering of the Partnership’s Common Units with anticipated gross offering proceeds of at least ​ (other than in connection with any at-the-market offering or similar continuous offering program), or # is in possession of material nonpublic information affecting the Common Units that the Partnership has determined, in the best interests of the Partnership, should not be publicly disclosed at that time, then the Partnership may suspend the BlackRock Purchaser’s right to require the Partnership to conduct an Underwritten Offering on the BlackRock Purchaser’s and such Selling Holder’s behalf pursuant to this [Section 2.03]; provided, however, that the Partnership may only suspend such demand registration right to require the Partnership to conduct an Underwritten Offering pursuant to this [Section 2.03] once in any six-month period and in no event for a period that exceeds an aggregate of 90 days in any 180-day period or 120 days in any 365-day period.

Resales Under Rule ​. It will take reasonable steps to inform persons acquiring Securities from the Initial Purchasers in the United States that the Securities # have not been and will not be registered under the Securities Act, # are being sold to them without registration under the Securities Act in reliance on Rule ​ and # may not be offered, sold or otherwise transferred except # to the Company, # outside the United States in accordance with Regulation S or # inside the United States in accordance with # Rule ​ to a person whom the seller reasonably believes is a QIB that is purchasing such Securities for its own account or for the account of a QIB to whom notice is given that the offer, sale or transfer is being made in reliance on Rule ​ or # pursuant to another available exemption from registration under the Securities Act.

Undertakings of Purchaser. Purchaser shall perform, or cause to be performed, when due, all obligations of Merger Sub under this Agreement.