A boy at a skate park is at the apex of his trick while other boys look on.
A group of children fishing at a pond.
If the children are in a skate park, they could not be fishing at a pond.
exists p1 p2 x1 x2 x3 x4 x5.(n_trick(x5) & of(x5,x4) & n_male(x4) & n_apex(x4) & exists e1 p3 x6.(exists s1.(Theme(s1,x6) & a_on(s1)) & Topic(e1,p3) & Actor(e1,x6) & v_look(e1) & -(x6 = x1) & n_boy(x6)) & n_boy(x1) & n_boy(x1) & while(p1,p2) & at(x1,x4) & of(x4,x5) & at(x1,x2) & n_park(x2) & of(x2,x3) & n_skate(x3))
exists x1 x2 x3 x4.(a_topic(x1) & at(x1,x4) & n_pond(x4) & of(x1,x2) & n_fishing(x2) & of(x2,x3) & n_child(x3) & n_group(x1))