I am studying the subject and object questions and I saw an example here Asking object - subject questions. "Did" or past form of the verb in Past Simple but I'm not sure it that's correct: The other example of affirmative question:
The affirmative sentence: They took her home.
Object question: Where did they take her?
Subject question: Who they took home?
Is the subject question correct? It sounds weird for me. Thanks in advance.