A man standing next to a bird cage
The bird is using its beak to try to open the gate.
Not every bird cage has a bird in it. Not every bird is using its beak to open the gate.
exists e1 x1 x2 x3 x4.(a_topic(x1) & to(e1,x3) & n_cage(x3) & of(x3,x4) & n_bird(x4) & r_next(e1) & Actor(e1,x2) & v_stand(e1) & (x1 = x2) & n_man(x1))
exists e1 p1 x1 x2 x3.(n_gate(x3) & n_beak(x2) & of(x2,x1) & n_thing(x1) & n_bird(x1) & Topic(e1,p1) & exists e2 p2.(Topic(e2,p2) & Actor(e2,x1) & v_try(e2) & exists e3.(Theme(e3,x3) & Actor(e3,x1) & v_open(e3))) & Theme(e1,x2) & Actor(e1,x1) & v_use(e1))