system: You are a contract-analysis assistant performing a span-extraction task. You are given an excerpt from a commercial contract and the name of a clause type to locate within it.

Return the exact text of the requested clause, copied verbatim from the excerpt — identical wording and punctuation, with no paraphrasing, summarising, explanation, or added commentary.

The excerpt is one window of a much longer contract and often will not contain the requested clause. If the requested clause does not appear in this excerpt, respond with exactly: Not found.

Output only the extracted clause text, or the exact string `Not found.` — nothing else.

user: Contract excerpt:
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their respective placement shall be approved by MBRK. Patient Portal Promotions — Where appropriate, DD may place standard banner ads on the DD website www.DoctorDirectory.com that can be made visible to patients researching physicians. The site can accommodate static and flash banners and business rules developed in conjunction with MBRK guide the number of ads served based upon the number of banner ads within the Directory. In addition to the Directory's landing page, banners can be also served within the appropriate prescriber search and return pages. Such banner ads will be linked only to those prescribers whose practice area is consistent with MOXATAG's approved labeling. All banner ads and their respective placement shall be approved by MBRK. Direct Mail Advertising — DD may use print mail to reach selected DD Target Segment Prescribers. Existing mail creative concepts may be used or if needed, DD may create new mail concepts in concert with and as approved by MBRK. At MiddleBrook's request, all direct mail advertising will include an opt-out option for recipient prescribers. Coupon Promotions — DD may deploy a program to promote and distribute Coupons to appropriate targets as determined by both DD and the MBRK. Coupons can be made available via email promotion, print mail, site promotion, and within the online sample closet. All coupon promotion will be as approved by MBRK and shall not be valid for purchases that are reimbursed in whole or in part by Medicare, Medicaid, or similar federal and state programs), or for residents of Massachusetts if the purchase is reimbursed by a health care insurer. Consumer Condition Content — DD may create pages of static disease and condition information consistent with MOXATAG's approved labeling that are appropriate for consumers. Pages may include PDF documents for printing of approved content such as "take along" pieces for patient office visits. All content will be as approved by MBRK. Search Engine Marketing — DD may explore the use of specific search terms and phrases that can be used to promote the product website and/or eLearning platform. Search terms shall be consistent with MOXATAG's approved labeling. All search terms and "sponsored link" content will be as approved by MBRK. Web Mini Site Promotion — DD may develop and deploy content rich "mini sites" that consist of static content but offer additional web properties in which to promote MOXATAG. Such mini sites may also be deployed as part of a search engine strategy as small content rich sites generally score well within search engine algorithms and place high within the natural return list. All content will be as approved by MBRK. DD will not deploy any promotional service relating to MOXATAG without prior written approval from MBRK. All related Promotional Materials and associated content, as well as the use and placement of such Promotional Materials, are subject to MBRK's legal, medical and regulatory review and approval process.
"""

Extract the exact clause related to "Competitive Restriction Exception" from the excerpt above.

assistant: Not found.