Where do they live? x Where do your grandparents live?

Hello everyone.
I would like take the doubt about questions in Present Simple is following.
I am studying and appear this question?

Q:"You don't know where Lisa's grandparents live. You want to know. Ask Lisa."

I say "Lisa, where do they live"? or "Lisa, Where do your grandparents live"?

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Avatar do usuário Cinnamon 15395 15 40 348
Hi there!

Both are correct.
The only difference is the context. We use pronouns to avoid repeating nouns and to simplify. If you already know who they are, that is "your grandparents", you can use THEY.

Avatar do usuário PPAULO 39775 6 32 695
I am studying and this question came up/appeared.

And cinnamon is spot on, you can´t simply say out of nowhere: "Lisa, where do they live"? (unless you are pointing in their direction (whoever "they" are, Lisa´s grandparents, friends, enemies, teachers, siblings, colleagues, etc.)

See? just asking that without specifying who ''they" are leaves many possibilities on the table.

If you were talking with Lisa, and about her grandpares, then you could have made that question and would be understood that way. Of course.

Fact is, you use pronouns to replace something previously named/informed, or if it is inferred from the conversation/text.