Premise: A man in a dark shirt and overalls is squatting down on gravel and working on a railroad car.

Hypothesis: A man dressed in a dark shirt with overalls is squatting down on gravel as he works on a railroad care.
Relation: entailment

Hypothesis: A man in a dark shirt with overalls squatting down on gravel while working on a railroad car
Relation: entailment

Hypothesis: Several men wearing overalls are working on a railroad car while knelling on gravel
Relation: entailment