Problem: Determine the topic of the question. Question: "when does black friday start for christmas?" Topic:

A: Black Friday (shopping)

Problem: Determine the topic of the question. Question: "where is good morning america studio?" Topic:

A: Times Square Studios

Problem: Determine the topic of the question. Question: "what is metformin used for?" Topic:

A: Metformin

Problem: Determine the topic of the question. Question: "What is and where is hydraulic fluid found and used for?" Topic:

A:
Hydraulic fluid