definiens: means the four ( 4 ) year period commencing upon theLaunch of the Product in the United States ; provided, however, that if Licensee has notbeen the subject of a Change of Control prior to the end of such four - year period, the FirstPosition Period shall be extended to the earlier of ( x ) the fifth ( 5th ) anniversary of thecommencement thereof and ( y ) any such Change of Control ; and further, provided, however, that if any such Change of Control occurs prior to the fourth ( 4th ) anniversary ofthe commencement of the First Position Period, then the party surviving such Change ofControl will be obligated to continue Detailing of the Product in First Position until such fourth(4th ) anniversary and Licensee will use Commercially Reasonable Efforts to obtain theagreement of the party surviving such Change of Control to continue Detailing of theProduct in First Position until the fifth ( 5th ) anniversary of the commencement of the FirstPosition Period, and if such Change of Control occurs after the fourth ( 4th ) anniversary ofsuch commencement of the First Position Period but before the fifth ( 5th ) such anniversary, then Licensee will use Commercially Reasonable Efforts to obtain the agreement of theparty surviving such Change of Control to continue Detailing of the Product in First Positionuntil such fifth ( 5th ) anniversary