premise: A man visiting a friend in the hospital. hypothesis: A man and a patient in a hospital room.
entailment: Visiting a friend  who is a patient usually happen in the hospital.|entailment: If the man is visiting his friend in the hospital this implies that his friend is a 'patient' and that they are in a hospital room.|entailment: Sentence 1 explains that the man is visiting a friend in the hospital while the second one explains that the friend the man was visiting is a patient in the hospital.