A dog looks at a fly above its head.
The dog is chasing a lizard.
looking and chasing are different activities
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 e1 x1 x2.(n_dog(x1) & Theme(e1,x2) & Actor(e1,x1) & v_chase(e1) & n_lizard(x2))