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:
"""
each day past the deadline in the schedule of this section. The "late fee" shall equal to 50% (fifty percent) of the runtime license fees paid to D2 for the previous two calendar quarters equally divided over 180 (one hundred eighty) days. In the event LICENSEE has selected the Buy-out option in the runtime license fee schedule of Exhibit C, then the "late fee" for each day past the deadline shall be 50% (fifty percent) of the Buy-out fee equally divided over 1095 (one thousand and ninety five) days; and this "late fee" shall be paid to LICENSEE each calendar month until the error is corrected either by D2 or LICENSEE. 6.4 Support. D2 will provide the following support to LICENSEE throughout the Warranty period and for those subsequent years for which support has been purchased by Licensee: (i) D2 will assist LICENSEE in determining if problems encountered by LICENSEE are caused by programming errors in the Licensed Technology. Software License D2 Technologies, Inc. and Maintenance Agreement August 4, 1997 CONFIDENTIAL 8 (ii) D2 will answer questions concerning the installation of Licensed Technology. (iii) D2 will assist LICENSEE in resolving LICENSEE's problems, if any, arising from the normal usage of the Licensed Technology. (iv) D2 shall appoint a qualified technical staff as the "Technical Contact" to co-ordinate all support and maintenance services. The "Technical Contact" shall be available to LICENSEE during D2's normal business hours; in the event that appointed "Technical Contact" is not available, a back-up "Technical Contact" shall be temporarily assigned and LICENSEE shall be notified. 6.5 Notification and Cooperation by LICENSEE. To obtain support from D2 under this Article 6, LICENSEE shall provide D2 with written notice which will contain a description of the problem for which LICENSEE is seeking support. D2 shall have no obligation to correct problems which are due to modifications to Licensed Technology performed by LICENSEE; provided, that if D2 agrees to correct such problems it shall charge its then current time and materials rates, which shall be payable by LICENSEE within thirty days after invoicing by D2. LICENSEE agrees to provide D2 with access to LICENSEE's equipment and computer systems on a temporary basis and as needed to allow D2 to reproduce, correct and verify the correction of the problem reported by LICENSEE or otherwise identified by D2. 7. LIMITED SOURCE CODE LICENSE AND PROTECTION 7.1 Source Code delivery. D2 shall, after acceptance of Licensed Technology by LICENSEE and within fifteen days after receiving such a request from LICENSEE deliver a copy of the fully commented Source Code for the then current version of the Licensed Technology and information needed for compiling and building the Licensed Technology Object Code to LICENSEE. Thereafter, D2 shall automatically deliver a copy of the fully commented Licensed Source Code for the then current version of the Licensed Technology within fifteen days after the release of any Updates or New Versions of the Licensed Technology. 7.2 Source Code Access Conditions. The following events shall constitute "Source Code Access Conditions": (i) D2's insolvency, general assignment for the benefit of creditors, or ceasing to do business, or (ii) D2's failure or inability to meet its warranty, maintenance and support obligations under Article 6, or its warranty obligations under Article 8.3, within fifteen days after written notice by LICENSEE to D2 of D2's failure to meet such obligations, or (iii) termination of this Agreement by LICENSEE pursuant to Articles 9.3 and 9.4, or (iv) as needed by LICENSEE for fault isolation. Software License D2 Technologies, Inc. and Maintenance Agreement August 4, 1997 CONFIDENTIAL 9 7.3 Use of Licensed Source Code. After "Source Code Access Conditions" is met, LICENSEE shall have the right to use, modify, reproduce and have reproduced Object Code from Licensed Source Code to develop, use, market, distribute, and to maintain and support the Licensed Technology in the Licensee Product. LICENSEE shall not have any right to develop new DSP technology or derivative DSP technology with the Licensed Source Code. 7.4 Confidentiality and security. (A) General. LICENSEE acknowledges and agrees that the Licensed Source Code constitutes the confidential and proprietary trade secrets of D2, and that LICENSEE's protection thereof is essential to this Agreement and a condition of LICENSEE's use and possession of the Licensed Source Code. LICENSEE shall retain in strict confidence any and all elements of the Licensed Source Code and use the Licensed Source Code only as expressly licensed herein. LICENSEE agrees that it will under no circumstances distribute or in any way disseminate or
"""

Extract the exact clause related to "Unlimited/All-You-Can-Eat-License" from the excerpt above.

assistant: Not found.