A dog looks at a fly above its head.
There are flies in the dog's house.
Sentence 1 is missing dog's house
exists e1 x1 x2 x3.(at(e1,x2) & above(x2,x3) & n_head(x3) & of(x3,x1) & n_thing(x1) & n_fly(x2) & Actor(e1,x1) & v_look(e1) & n_dog(x1))
exists p1 x1 x3 x4.(n_house(x4) & of(x4,x3) & n_dog(x3) & exists x2.((x1 = x2) & in(x2,x4) & n_fly(x2)))