Premise: A dirt bike rider fully dressed in his safety gears rides on a muddy dirt road.

Hypothesis: A professional dirt biker riding his bike.
yes

Premise: An elderly man drives a unique firetruck.

Hypothesis: The elderly man is driving a firetruck.
yes

Premise: A man in a white and red shirt is sitting on a brown couch in front of a white refrigerator and floral drapes.

Hypothesis: The man just bought the couch the day previous.
it is not possible to tell

Premise: Two girls walking underneath a purple umbrella.

Hypothesis: The sisters share a purple umbrella.
it is not possible to tell