premise: Three men in military uniforms and one man in a shirt that says "Canada" are cutting a ribbon. hypothesis: Three men in military uniforms are by a man with a shirt that says "Canada".
entailment: For three men to be doing an activity with one man, the three men must be by the one man. Here the one man is in a 'Canada' shirt, so they must be by a man with a 'Canada' shirt.