The young man is waiting with others on the sidewalk.
The girls are climbing a tree
A young man isn't girls. Waiting with others isn't climbing a tree.
exists e1 s1 x1 x2 x3 x4.(n_sidewalk(x4) & n_person(x3) & n_man(x1) & a_young(s1) & Theme(s1,x1) & on(e1,x4) & with(e1,x2) & -(x2 = x3) & n_person(x2) & Actor(e1,x1) & v_wait(e1))
exists e1 x1 x2.(n_girl(x1) & Theme(e1,x2) & Actor(e1,x1) & v_climb(e1) & n_tree(x2))