Premise: A janitor flashes a smile while he cleans a replica small building with a vacuum cleaner.

Hypothesis: janitor smiling while working
yes

Premise: Whole families, including children, donned hard hats to observe the rig on the edge of town.

Hypothesis: families wearing hard hats
yes

Premise: A young Asian man is sitting on a rusted bike in the middle of the wet street.

Hypothesis: A man is standing, waiting for a subway in NYC.
no

Premise: A brown dog playing in mud.

Hypothesis: A white dog emerges clean from her bath.
no