Three people, are having a casual conversation.
The people are wearing shoes.
Not all people wear shoes.
exists e1 s1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_conversation(x2) & a_casual(s1) & Theme(s1,x2) & n_people(x1) & card_eq_3(x1))
exists e1 x1 x2.(n_people(x1) & Theme(e1,x2) & Actor(e1,x1) & v_wear(e1) & n_shoe(x2))