In this task, you are given two natural language statements with similar wording. You must choose the statement that makes less sense based on common sense knowledge. A '
' separates the statements. Use "first" or "second" to indicate which sentence makes less sense.

Q: Ben wants to teach piano because he has been playing the piano since he was five years old
Ben wants to teach piano because he has been playing the violin since he was five years old

A: second
****
Q: I was visited by my uncle today and we had dinner together.
I was visited by an dolphin today and we had dinner together.

A: second
****
Q: Crab grass is a healthy food.
Wheat grass is a healthy food.

A:
first
****