Found:

Subject

SYNTAX: The subject of a sentence is the category that occupies the specifier position of IP ([Spec, IP]), or some other designated phrase and which in finite clauses agrees with the finite verb. Furthermore, if a verb assigns an agent-role and it is not a passive verb, the agent-role is associated with the subject. Also, if nominative case is assigned, it is assigned to the subject. Stowell (1983) has proposed that all lexical phrase may contain a subject, presumably in the specifier position (e.g. John in John's attempt).

LIT.	Chomsky, N. (1981) Chomsky, N. (1970) Stowell, T. (1983)