Premise: A man kneels on the ground doing some sort of project on his own.

Hypothesis: The man is working on something on the ground.
yes

Premise: A crowd of people run a marathon in a cityscape with two skyscrapers in the background.

Hypothesis: The people run a marathon to raise money for charity.
it is not possible to tell

Premise: A woman in black and purple is twirling a ribbon and holding her leg behind her.

Hypothesis: A woman is wearing only one color.
no

Premise: A mob of Chileans are protesting in the streets with banners.

Hypothesis: A mob of Mexicans are protesting in the streets with banners.
no