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: Cows chew water
Cows chew cud

A: first
****
Q: A keystone helps support an arch
A branch helps support an arch

A: second
****
Q: if you swim in the river, you know that the water is salty
if you swim in the sea, you know that the water is salty

A:
first
****