Two professional businessmen having a conversation.
Two men sail the seas on a yacht.
Sailing is not having a conversation.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_conversation(x2) & n_businessman(x1) & a_professional(s1) & Theme(s1,x1) & card_eq_2(x1))
exists e1 x1 x2 x3.(n_sea(x2) & on(e1,x3) & n_yacht(x3) & Theme(e1,x2) & Actor(e1,x1) & v_sail(e1) & n_man(x1) & card_eq_2(x1))