The boy is skateboarding on the bench by the fence.
The child is in the library.
There is either a boy skateboarding on the bench, or a child in the library.
exists e1 x1 x2 x3.(n_fence(x3) & n_bench(x2) & n_boy(x1) & by(e1,x3) & on(e1,x2) & Actor(e1,x1) & v_skateboard(e1))
exists p1 x1 x2.(n_library(x2) & n_child(x1) & in(x1,x2))