( Third ( , ( heat ( ( ( ( expands , ) cold ) contracts ) . ) ) ) )
(ROOT (S (ADVP (LS Third)) (, ,) (NP (NN heat)) (VP (VP (VBZ expands)) (, ,) (ADVP (NN cold)) (VP (VBZ contracts))) (. .)))
Third, heat expands, cold contracts.
(ROOT (S (NP (NP (DT The) (NN liquid)) (PP (IN in) (NP (DT a) (NN thermometer)))) (VP (VP (VBZ expands)) (CC or) (VP (VBZ contracts) (S (VP (TO to) (VP (VB respond) (PP (TO to) (NP (NN heat) (CC or) (NN cold)))))))) (. .)))