Premise: A man in a dark shiny suit plays the piano and sings on stage.

Hypothesis: The male is performing for an audience.
it is not possible to tell

Premise: A protester is standing with a sign.

Hypothesis: A woman holds a sign
it is not possible to tell

Premise: Two girls walking one behind the other in front of green door frames.

Hypothesis: Two girls are walking.
yes

Premise: A woman wearing a white tank top, sticking out her tounge and pointing to herself.

Hypothesis: The woman is sitting in a library reading a book.
no