Premise: A semi trailer is inside a building, and people are gathered behind its open rear door where there are displays being set up.

Hypothesis: A new department store is opening and the semi-trailer is delivering product.
Relation: neutral

Hypothesis: It is actually a zombie apocalypse and the semi-trailer is carrying vital supplies.
Relation: contradiction

Hypothesis: A semi-trailer is being unloaded by a group of people.
Relation: neutral