the two couples are chatting by the bus.
The two couples are outside
A bus is typically outside
exists e1 x1 x2.(n_bus(x2) & n_couple(x1) & card_eq_2(x1) & by(e1,x2) & Actor(e1,x1) & v_chat(e1))
exists s1 x1.(n_couple(x1) & card_eq_2(x1) & Theme(s1,x1) & a_outside(s1))