premise: Two boys in red soccer uniforms stand in a green field. hypothesis: Two youths wearing soccer gear are ready on the field.
entailment: Boys usually implies males of a young age, so they could also be referred to as youths. That they are in red soccer uniforms means they are wearing them. Such uniforms are an item of soccer gear, so if they are wearing uniforms they are wearing soccer gear. If they stand, then they are not active. So it could be said they are ready to become active.