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:
"""
sales of Products during the Term, except as provided in the following sentence, of two percent (2%) of the "Royalty Base," which Royalty Base shall be calculated as the wholesale selling price of all Products for which the Company actually receives the proceeds of such net of returns, allowances, discounts, shipping, taxes, insurance and credits. During the Term, the Company shall pay the Royalty Fee, earned for the preceding quarter, to the Professional quarterly, within thirty (30) days of the end of the succeeding calendar year quarter. If the Company decides not to renew this Agreement in accordance with the provisions of Section 8 below, the Company shall pay the Professional an amount equal to two percent (2%) of the net book value of its unsold inventory of Products on December 31, 2004. 4.3 If the Company elects to create and market the Products, the Company will grant to the Professional options to purchase shares of the Company's capital stock ("Options"), as provided in this paragraph. On each March 31, June 30, September 30, and December 31 during the Term that the Company elects to continue the marketing and sale of the Products, the Company will grant to the Professional a number of Options (the "Quarterly Grant Number"). -3- 4 EXECUTION COPY The Quarterly Grant Number shall be the nearest whole number that results from the division of the number of dollars represented by one half of one percent (0.5%) of the Royalty Base by the closing price of the Company's stock on the grant date. The exercise price of the Options shall be the closing price of the Company stock on the grant date. The sum of the Quarterly Grant Numbers in each calendar year of the Term shall not exceed fifteen thousand (15,000). The options will expire five (5) years after each grant date. The Options shall not be assigned, transferred or alienated by the Professional. Any attempt to assign, transfer or alienate the Options without the prior written consent of the Company shall be void. 4.4 The Company will reimburse the Professional for her reasonable and necessary travel expenses in connection with her performance of the Services. 4.5 The Company shall be under no obligation to create, market, promote or sell the Products. There shall be no minimum amounts due from the Company hereunder except as specified in Section 4.1 above. The failure of the Company to create, market, promote or sell the Products or to reach any specific sales volume shall not result in any liability of the Company or create any right for the Professional to make a claim against the Company. The Company may elect to dispose of the Products at any price or for no consideration in its sole discretion and shall not be obligated to the Professional for any sale or transfer of the Products which does not produce compensation for the Professional. 5. PROFESSIONAL'S CONDUCT. 5.1 The Professional shall at all times during the Term refrain from: 5.1.1 dishonest, fraudulent, illegal or unethical acts or omissions; 5.1.2 excessive use or abuse of alcohol; 5.1.3 use of controlled substances, except as prescribed by a licensed medical professional in the treatment of illness or disease; 5.1.4 acts or omissions reasonably determined by the Company to be prejudicial or injurious to the business or goodwill of the Company, its officers, employees, shareholders or products, the golf industry or professional golf; and 5.1.5 conduct which could reasonably be expected to degrade the Professional, devalue the services of the Professional or to bring the Professional into public hatred, contempt, scorn or ridicule, or that could reasonably be expected to shock, insult or offend the community or to offend public morals or decency. 6. INDEPENDENT CONTRACTOR. 6.1 With respect to all Services described in this Agreement, the Professional's status will be that of an independent contractor and not a partner, employee or agent of the Company. The Professional has no power or authority whatsoever to make binding commitments or -4- 5 EXECUTION COPY contracts on behalf of the Company. The Professional agrees that she will pay and hold the Company harmless from any and all costs, expenses, fees, dues, pension contributions, benefit contributions and fines associated with her present or future required membership in any trade association, union or professional organization, including but not limited to LPGA, PGA, USGA, SAG or AFTRA, that may be associated with her performance of this Agreement. The Professional represents that no agent or representative fees, charges, rights or claims exist in
"""

Extract the exact clause related to "Warranty Duration" from the excerpt above.