The young boys are looking for apples that do n't exist.
The young boys are looking for apples that do n't exist because it is a peach tree.
The young boys aren't necessarily looking for apples on a peach tree.
exists e1 s1 x1 x2 x3.(n_boy(x1) & a_young(s1) & Theme(s1,x1) & for(e1,x2) & -exists e2.(Actor(e2,x3) & v_exist(e2)) & (x2 = x3) & n_apple(x2) & Actor(e1,x1) & v_look(e1))
exists e1 s1 x1 x2 x3.(n_thing(x1) & n_boy(x1) & a_young(s1) & Theme(s1,x1) & for(e1,x2) & -exists e2 p1.(exists p2 x4 x5.((x1 = x4) & n_tree(x4) & of(x4,x5) & n_peach(x5)) & because(e2,p1) & Actor(e2,x3) & v_exist(e2)) & (x2 = x3) & n_apple(x2) & Actor(e1,x1) & v_look(e1))