definiens: shall mean, as the context may require, any one or more of the following four spac es individually or all four of such spaces collecti vely : ( i ) the space of approximately 10,462 square feet commonly known as 250 East Grand Avenue, Suite 65 and presen tly occupied by Farmers Insurance : ( ii ) the space of ap proximately 6.489 square feet commonly known as 250 East Grand Avenue, Suite 90 and presently occupied by Gr yphon Sciences ; ( iii ) the space of approximately 24, 725 presently occupied by ViroLogic, Inc. on the easter ly end of the building commonly known as 270 East G rand Avenue ; and ( iv ) the building commonly known as 280 East Grand Avenue, presently occupied by Cytokinet ics, Inc., and containing approximately 50,195 square fe et ( the ) . The four spaces constituting the First Refusal Space are designated as such on the Site Plan