An unhappy looking child lays in the grass at a park.
A child is sad.
Sad is a synonym for unhappy.
exists e1 s1 x1 x2 x3 x4.(n_grass(x3) & a_topic(x1) & in(x1,x3) & at(x3,x4) & n_park(x4) & n_lay(x1) & of(x1,x2) & n_child(x2) & Actor(e1,x1) & v_look(e1) & a_unhappy(s1) & Theme(s1,x1))
exists s1 x1.(Theme(s1,x1) & a_sad(s1) & n_child(x1))