Semantic role of "the coat" in "the coat lay on the bed"?

What is a semantic role of "the coat" in the sentence "the coat lay on the bed"?

Solution 1:

An entity which undergoes a change of location or possession, or whose location or possession is specified, is called a theme.

See Jeffrey Gruber, Studies in Lexical Relations, Diss. MIT, 1965, 47-60.

(By the way, in case this seems an odd choice of term: in Ancient Greek a thema was something "put down or placed" ... the modern sense derives from its use in the sense "proposition", something set down for discussion.)

Solution 2:

Here's another opinion:

Patient (grammar)

From Wikipedia (tidied):

In linguistics, a grammatical patient, also called the target or undergoer, is the participant of a situation upon whom an action is carried out. A patient as differentiated from a theme must undergo a change in state. A theme is denoted by a stative verb, whereas a patient is denoted by a dynamic verb. (At the very least, there is debate to this effect.) Also, patient is the name of the thematic relation with the above definition.

. . .

The term "theme" is often used to describe the same relation as patient.

It looks like we have the usual confusion of terms.