The Semantics of a Frame Setter

The semantics of a frame setter. So you use it to kind of introduce the setting of a sentence like in time or space. What English does with topicality is it basically just infers it from definiteness, which is very similar to topicality. Usually definite things have to be identifiable topics usually have to be identified. And subject hood, like generally topics or subjects cross linguistically and in English, that's one of the best ways to make something a topic is to use voice morphology and make it the subject.