( ( ( ( Hydrogen 's ) state ) ( of matter ) ) ( ( is ( gas ( at ( ( standard conditions ) ( of ( ( temperature and ) pressure ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NP (NNP Hydrogen) (POS 's)) (NN state)) (PP (IN of) (NP (NN matter)))) (VP (VBZ is) (NP (NP (NN gas)) (PP (IN at) (NP (NP (JJ standard) (NNS conditions)) (PP (IN of) (NP (NN temperature) (CC and) (NN pressure))))))) (. .)))
Hydrogen's state of matter is gas at standard conditions of temperature and pressure.
(ROOT (S (NP (NNP Hydrogen)) (VP (VBZ is) (PP (IN in) (NP (NP (NN gas) (NN form)) (PP (IN at) (NP (NN room) (NN temperature)))))) (. .)))