premise: Three males and one female are posing for a photograph with snow on the ground and mountains covered with green trees and snow in the background. hypothesis: Four people pose for an outdoor photo.
entailment: If there are three males and on female posing near the mountains, then there must be four people posing outdoors.|entailment: Three males and one females adds up to four people.|entailment: Three males and one female are four people. Snow, mountains, and trees are outdoor features so this means the photo is taken outdoor.