( ( ( This property ) ( ( combined ( with ( the fact ) ) ) ( that ( mercury ( ( expands and ) ( ( contracts evenly ) ( with ( changes ( in temperature ) ) ) ) ) ) ) ) ) ( , ( it ( ( is ( ( an ( ideal material ) ) ( for ( liquid ( ( thermometers and ) barometers ) ) ) ) ) . ) ) ) )
(ROOT (S (S (NP (DT This) (NN property)) (VP (VBD combined) (PP (IN with) (NP (DT the) (NN fact))) (SBAR (IN that) (S (NP (NN mercury)) (VP (VP (VBZ expands)) (CC and) (VP (VBZ contracts) (ADVP (RB evenly)) (PP (IN with) (NP (NP (NNS changes)) (PP (IN in) (NP (NN temperature))))))))))) (, ,) (NP (PRP it)) (VP (VBZ is) (NP (NP (DT an) (JJ ideal) (NN material)) (PP (IN for) (NP (JJ liquid) (NNS thermometers) (CC and) (NNS barometers))))) (. .)))
This property combined with the fact that mercury expands and contracts evenly with changes in temperature, it is an ideal material for liquid thermometers and barometers.
(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)))))))) (. .)))