Two men are speaking on a sidewalk.
A group of people having a conversation
Two men doesn't equal a group of people
exists e1 x1 x2.(on(e1,x2) & n_sidewalk(x2) & Actor(e1,x1) & v_speak(e1) & n_man(x1) & card_eq_2(x1))
exists e1 x1 x2 x3 x4.(a_topic(x1) & of(x1,x2) & Theme(e1,x4) & Actor(e1,x3) & v_have(e1) & n_conversation(x4) & (x2 = x3) & n_people(x2) & n_group(x1))