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.

A person who is studying at a university or other place is called student
A person who is studying at a university or other place is called teacher
second

we must exercise to sustain energy levels
we must eat to sustain energy levels
first

He was so sad that he couldn't stop smiling.
He was so happy that he couldn't stop smiling.

first