An a unhappy couple sitting at a table in a restaurant.
A couple sits and looks unhappy at a restaurant.
the couple sitting at the  table in restaurant looks at unhappy.
exists e1 s1 x1 x2 x3 x4.(a_topic(x1) & at(e1,x3) & in(x3,x4) & n_restaurant(x4) & n_table(x3) & Actor(e1,x2) & v_sit(e1) & (x1 = x2) & n_couple(x1) & a_unhappy(s1) & Theme(s1,x1))
exists e1 e2 p1 x1 x2 x3.(at(e2,x3) & n_restaurant(x3) & exists s1.(Theme(s1,x2) & a_unhappy(s1)) & Topic(e2,p1) & Actor(e2,x2) & v_look(e2) & n_couple(x2) & Actor(e1,x1) & v_sit(e1) & n_couple(x1))