A couple sitting by a bush.
Two strangers sit together.
A couple are not strangers.
exists e1 x1 x2 x3.(a_topic(x1) & by(e1,x3) & n_bush(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_couple(x1))
exists e1 s1 x1.(a_together(s1) & Manner(e1,s1) & Actor(e1,x1) & v_sit(e1) & n_stranger(x1) & card_eq_2(x1))