At 80 he was still cold.
( ( At 80 ) ( he ( ( ( was still ) cold ) . ) ) )
(ROOT (S (PP (IN At) (NP (CD 80))) (NP (PRP he)) (VP (VBD was) (ADVP (RB still)) (ADJP (JJ cold))) (. .)))
He's pretty warm at 80, maybe he's not dead.
( ( ( ( ( He ( 's ( pretty ( warm ( at 80 ) ) ) ) ) , ) maybe ) ( he ( ( 's not ) dead ) ) ) . )
(ROOT (S (S (NP (PRP He)) (VP (VBZ 's) (ADJP (RB pretty) (JJ warm) (PP (IN at) (NP (CD 80)))))) (, ,) (ADVP (RB maybe)) (S (NP (PRP he)) (VP (VBZ 's) (RB not) (ADJP (JJ dead)))) (. .)))