Under New York law, "[t]he construction of a contract of guaranty is governed by the same rules as any other contract." Leyenson v. Lindenbaum, 158 N.Y.S. 355, 356 (N.Y.App. Term 1916). Thus, the Guaranty should be "interpreted so as to give effect to the intention of the parties as expressed in the unequivocal language they have employed."