definiens: means the period beginning on the last day of the Research Program Term and ending on(a ) the last day of the Research Program Tail Period, ( b ) with respect to a Collaboration Candidate that is not a FullyScreened Collaboration Candidate as of the last day of the Research Program Tail Period because it fails to meetclause ( b ) or clause ( c ) of Section 1.138, the date on which such Collaboration Candidate becomes a Fully ScreenedCollaboration Candidate ( if clause ( c ) of this Section 1.285 does not apply ) or ( c ) with respect to any CollaborationCandidate or Active+ Compound that is ( i ) the subject of an Additional Research Program that continues after theResearch Program Tail Period during the remainder of the Tail Period, or ( ii ) selected by [COMPANY] prior to the endof the Research Program Tail Period ( or, in the case of a Collaboration Candidate that becomes a Fully ScreenedCollaboration Candidate or that is generated or identified in an Additional Research Program after the end of theResearch Program Tail Period, prior to the end of the Tail Period ) for additional research activities pursuant toSection 4.8 during the remainder of the Tail Period, in each case ( ( i ) and ( ii ) ) the ARP Selection Date, whichever islater ; provided that if and only if the entire Agreement is terminated by either Party pursuant to Section 11.2.1, byAstraZeneca pursuant to Section 11.2.3 or by [COMPANY] pursuant to Section 11.2.4, or if the Research Program isterminated by [COMPANY] pursuant to Section 11.2.2(a ) ( and not Section 11.2.2(b ) ), the effective date of suchtermination shall be the last day of the Tail Period . For purposes of clarity, if the Research Program or this Agreementis terminated for any other reason, the Tail Period shall survive