He pointed at his bald head.
( He ( ( pointed ( at ( his ( bald head ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD pointed) (PP (IN at) (NP (PRP$ his) (JJ bald) (NN head)))) (. .)))
He lost all of his hair in a fire.
( He ( ( ( lost ( all ( of ( his hair ) ) ) ) ( in ( a fire ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD lost) (NP (NP (DT all)) (PP (IN of) (NP (PRP$ his) (NN hair)))) (PP (IN in) (NP (DT a) (NN fire)))) (. .)))