Children play soccer as adults look on.
The parents are watching their children play a soccer game at school.
Adults watching children play soccer are not assumed to be the children's parents.  A soccer game is not assumed to be at school.
exists e1 p1 x1 x2.(exists e2 p2 x3.(exists s1.(Theme(s1,x3) & a_on(s1)) & Topic(e2,p2) & Actor(e2,x3) & v_look(e2) & n_adult(x3)) & as(e1,p1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_soccer(x2) & n_child(x1))
exists e1 e2 x1 x2 x3 x4 x5 x6.(n_child(x2) & of(x2,x1) & n_thing(x1) & n_parent(x1) & Theme(e2,x2) & Actor(e2,x1) & v_watch(e2) & at(e1,x6) & n_school(x6) & Theme(e1,x4) & Actor(e1,x3) & v_play(e1) & n_game(x4) & of(x4,x5) & n_soccer(x5) & (x2 = x3))