Problem: Determine the topic of the question. Question: "how does a dredge work??" Topic:

A: Dredging

Problem: Determine the topic of the question. Question: "what is "thin film" technology?" Topic:

A: Thin film

Problem: Determine the topic of the question. Question: "how much of earth is covered ocean water?" Topic:

A: Ocean

Problem: Determine the topic of the question. Question: "how many people live in memphis tennessee?" Topic:

A:
Memphis, Tennessee