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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Source: FUELCELL ENERGY INC, 8-K, 11/6/2019 2) Other Applications. In the event FCE notifies ExxonMobil that it has formally decided not to pursue Generation 2 Technology for Power Applications, then upon ExxonMobil's written request, FCE agrees to negotiate a grant to ExxonMobil and its Affiliates, under commercially reasonable terms to be determined in good faith, a worldwide, royalty-bearing (with the royalty to be negotiated), non-exclusive, sub-licensable right and license to practice FCE Background Information and FCE Background Patents for Generation 2 Technology in any application outside of Carbon Capture Applications and Hydrogen Applications. More particularly, said right and license to practice FCE Background Information and FCE Background Patents for Generation 2 Technology in any application outside of Carbon Capture Applications and Hydrogen Applications will include the right to use, reproduce, and create derivative works of FCE Background Information under applicable copyrights and the right to make, use, import, and sell or offer to sell under the claims of FCE Background Patents. Nothing in this Paragraph 8.02(a)(2) will create an obligation on the part of FCE to grant ExxonMobil a license or right under FCE Background Patents or FCE Background Information if the Parties do not agree on the terms and conditions of such license. (b) Grant to FCE. 1) Generation 1 Technology. i. Outside of Carbon Capture Applications. ExxonMobil grants FCE a worldwide, non-exclusive, royalty- free, non-sub-licensable (except as set forth herein), perpetual, irrevocable (except as stated in Paragraphs 12.03 (Failure to Perform), 12.04 (Other Termination), and 12.05 (Bankruptcy)), non- transferable (except pursuant to Article 14 (Assignment)) right and license to practice ExxonMobil Background Information and ExxonMobil Background Patents for Generation 1 Technology in any applications outside of Carbon Capture Applications. More particularly, said right and license to practice ExxonMobil Background Information and ExxonMobil Background Patents for Generation 1 Technology in any applications outside of Carbon Capture Applications includes the right to use, reproduce, and create derivative works of ExxonMobil Background Information under applicable copyrights and the right to make, use, import, and sell or offer to sell under the claims of ExxonMobil Background Patents. All rights and licenses in this Paragraph (b)(1)(i) may be extended to contractors performing work on behalf of FCE but are not otherwise sub-licensable. ii. Authorized Third Parties. ExxonMobil grants FCE a worldwide, non-exclusive, royalty-free, non-sub- licensable (except as set forth herein), perpetual, irrevocable (except as stated in Paragraphs 12.03 (Failure to Perform), 12.04 (Other Termination), and 12.05 (Bankruptcy)), non-transferable (except pursuant to Article 14 (Assignment)) right and license to practice ExxonMobil Background Information and ExxonMobil Background Patents for Generation 1 Technology in Carbon Capture Applications, solely to conduct Authorized Work with Authorized Third Parties. More particularly, said right and license to practice ExxonMobil Background Information and ExxonMobil Background Patents for Generation 1 Technology in Carbon Capture Applications includes the right to use, reproduce, and create derivative works of ExxonMobil Background Information under applicable copyrights and the right to make, use, and import (but not sell or offer to sell) under the claims of ExxonMobil Background Patents, solely to conduct Authorized Work with Authorized Third Parties. All rights and licenses in this Paragraph (b)(1)(ii) may be extended to contractors performing work on behalf of FCE but are not otherwise sub-licensable. Page 9 of 31 Source: FUELCELL ENERGY INC, 8-K, 11/6/2019 iii. Carbon Capture Application. In the event that ExxonMobil fails to notify FCE before the end of the Term of the Agreement of ExxonMobil's intent to negotiate a subsequent or follow-on commercial agreement, ExxonMobil agrees to negotiate a grant to FCE, under commercially reasonable terms to be determined in good faith, a worldwide, royalty-free, non-exclusive, non-sub-licensable (except as set forth herein) right and license to practice ExxonMobil Background Information and ExxonMobil Background Patents for Generation 1 Technology in Carbon Capture Applications. More particularly, said right and license to practice ExxonMobil Background Information and ExxonMobil Background Patents for Generation 1 Technology in Carbon Capture Applications will include the right to use, reproduce, and create derivative works of ExxonMobil Background Information under applicable copyrights and the right to make, use, import, and sell or offer to sell under the claims of ExxonMobil Background Patents. The rights and licenses in this Paragraph (b)(1)(iii) will be extendable t o contractors performing work on behalf of FCE but will not otherwise sub-licensable. Nothing in this section will create an obligation on the part of ExxonMobil to grant FCE a license or right under ExxonMobil Background Patents or ExxonMobil Background Information if the Parties do not agree on the terms and
"""

Extract the exact clause related to "Irrevocable Or Perpetual License" from the excerpt above.

assistant: ExxonMobil grants FCE a worldwide, non-exclusive, royalty-free, non-sub- licensable (except as set forth herein), perpetual, irrevocable (except as stated in Paragraphs 12.03 (Failure to Perform), 12.04 (Other Termination), and 12.05 (Bankruptcy)), non-transferable (except pursuant to Article 14 (Assignment)) right and license to practice ExxonMobil Background Information and ExxonMobil Background Patents for Generation 1 Technology in Carbon Capture Applications, solely to conduct Authorized Work with Authorized Third Parties.