A boy holds his hands on his head.
The boy is under the age of 18.
Boy implies one under the age of 18.
exists e1 x1 x2 x3.(on(e1,x3) & n_head(x3) & of(x3,x1) & n_male(x1) & n_male(x1) & Theme(e1,x2) & Actor(e1,x1) & v_hold(e1) & n_hand(x2) & of(x2,x1) & n_boy(x1))
exists p1 x1 x2.(n_age(x2) & n_boy(x1) & exists x3.(under(x1,x2) & of(x2,x3) & n_date(x3) & a_date_day_18(x3) & a_date_day_18(x3)))