( ( Sizing ( of ( thermal ( expansion tanks ) ) ) ) . )
(ROOT (NP (NP (VBG Sizing)) (PP (IN of) (NP (JJ thermal) (NN expansion) (NNS tanks))) (. .)))
Sizing of thermal expansion tanks.
(ROOT (S (NP (DT The) (NN term) (JJ thermal) (NN expansion)) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB describe) (NP (NP (DT the) (NN change)) (PP (IN in) (NP (NN size) (CC or) (NN volume))) (PP (IN of) (NP (NP (DT a) (VBN given) (NN mass)) (PP (IN with) (NP (NN temperature))))))))))) (. .)))