premise: Two men exchange conversation in a crowded place.
hypothesis: Two men have a conversation in a crowded place.
explanation_1: To exchange conversation is the same as to have a conversation.
explanation_2: Two men exchange  conversation in a place that is crowded.
explanation_3: Have a conversation is another way of saying exchange conversation.
premise_logic: exists s1 x1 x2 x3 x4.(a_topic(x1) & in(x1,x4) & n_place(x4) & a_crowded(s1) & Theme(s1,x4) & n_conversation(x1) & of(x1,x3) & n_exchange(x3) & of(x1,x2) & n_man(x2) & card_eq_2(x1))
hypothesis_logic: exists e1 s1 x1 x2 x3.(in(e1,x3) & n_place(x3) & a_crowded(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_conversation(x2) & n_man(x1) & card_eq_2(x1))
premise_sim: exists s1 x1 x2 x3 x4.(of(x1,x3) & of(x1,x2) & n_place(x4) & n_man(x2) & n_exchange(x3) & n_conversation(x1) & in(x1,x4) & card_eq_2(x1) & a_topic(x1) & a_crowded(s1) & Theme(s1,x4))
hypothesis_sim: exists e1 s1 x1 x2 x3.(v_have(e1) & n_place(x3) & n_man(x1) & n_conversation(x2) & in(e1,x3) & card_eq_2(x1) & a_crowded(s1) & Theme(s1,x3) & Theme(e1,x2) & Actor(e1,x1))