A child is observing a chicken in a cage.
The child is at the zoo.
All children observing a chicken in a cage are not at the zoo.
exists e1 x1 x2 x3.(in(e1,x3) & n_cage(x3) & Theme(e1,x2) & Actor(e1,x1) & v_observe(e1) & n_chicken(x2) & n_child(x1))
exists p1 x1 x2.(n_zoo(x2) & n_child(x1) & at(x1,x2))