A young boy pulls a shirt off his head.
The boy is changing clothes.
Just because a boy pulls of his shirt does not mean he is changing his clothes.
exists e1 s1 x1 x2 x3.(off(e1,x3) & n_head(x3) & of(x3,x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_pull(e1) & n_shirt(x2) & n_boy(x1) & a_young(s1) & Theme(s1,x1))
exists e1 x1 x2.(n_boy(x1) & Theme(e1,x2) & Actor(e1,x1) & v_change(e1) & n_clothes(x2))