Workers dig deeply into a rock and stone hole with tools placed on the ground before them .
The work is difficult .
Workers dig deeply into a rock and stone hole with tools placed on the ground before them.
The work is difficult.
Label: neutralExplanation: There are people working but we don't know if it's difficult or not.
Label : neutralExplanation : There are people working but we do n't know if it 's difficult or not .