Children at an aquarium looking at different kinds of fish.
There are fish at the aquarium.
The children are at an aquarium looking at fish; therefore, there are fish in the aquarium.
exists e1 x1 x2 x3 x4 x5.(n_kind(x4) & at(e1,x3) & of(x3,x5) & n_fish(x5) & -(x3 = x4) & n_kind(x3) & Actor(e1,x1) & v_look(e1) & at(x1,x2) & n_aquarium(x2) & n_child(x1))
exists p1 x1 x3.(n_aquarium(x3) & exists x2.((x1 = x2) & at(x2,x3) & n_fish(x2)))