You are given an open-domain question from an open movie database. Your task is to provide an answer to that question. Try to only include the answer. Do not put it in a sentence.

what does Ian Nelson star in?
Switchback, The Boy Next Door

who is the director that directed Conversation Piece?
Luchino Visconti

who acted in the movie A Screaming Man?

Youssouf Djaoro, Hadje Fatime N'Goua, Dioucounda Koma, Emile Abossolo M'bo