Sentence examples for who sat from inspiring English sources

The phrase "who sat" is correct and can be used in written English.
It is known as a relative clause, which is a type of dependent clause that gives additional information about the subject of the sentence. Example: "The woman, who sat at the front of the classroom, raised her hand to answer the teacher's question." In this sentence, "who sat at the front of the classroom" is a relative clause that provides more detail about the subject "the woman." It could be rewritten as "The woman, sitting at the front of the classroom, raised her hand to answer the teacher's question."