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 bed sheet can be used to cover a bed.
A bed sheet can be used to mop the floor.
second

Surgery develops as time passes
Surgery falls back as time passes
second

An oak tree has gills to breathe under water.
A fish has gills to breathe under water.

first