( ( The system ) ( ( uses ( liquid ( nitrogen ( to ( cool ( the superconductor ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN system)) (VP (VBZ uses) (NP (JJ liquid) (NN nitrogen) (S (VP (TO to) (VP (VB cool) (NP (DT the) (NN superconductor))))))) (. .)))
The system uses liquid nitrogen to cool the superconductor.
(ROOT (S (NP (NN Liquid) (NN nitrogen)) (VP (VBZ is) (VP (VBN used) (PP (IN for) (NP (NP (VBG cooling) (NNS detectors)) (PP (IN of) (NP (JJ infrared) (NNS telescopes))))))) (. .)))