What is the test for "semantically reasonable" candidate of meaning of a writing?

semantically reasonable, candidate of meaning of a writing. [Citations.]'" (Benedek v. PLC Santa Monica (2002) 104 Cal.App.4th 1351, 1357 [129 Cal.Rptr.2d 197].)

(3) To give effect to the parties' intent, we may look to evidence of the circumstances surrounding execution of the lease. (Civ. Code, 1647 ["contract may be explained by reference to the circumstances under which it was made, and the matter to which it relates"]; see also Nish Noroian Farms v. Agricultural Labor Relations Bd. (1984) 35 Cal.3d 726, 735 [201 Cal.Rptr. 1, 677 P.2d 1170] [factual context in which agreement reached relevant to establish meaning unless words themselves susceptible to only one interpretation].)