( What ( ( is ( ( the ( common name ) ) ( of ( ( the substance ) ( ( whose molecules ) ( each ( consists ( of ( ( ( ( two atoms ) ( of ( the ( gas hydrogen ) ) ) ) and ) ( ( one atom ) ( of ( the ( gas oxygen ) ) ) ) ) ) ) ) ) ) ) ) ) ? ) )
(ROOT (SBARQ (WHNP (WP What)) (SQ (VBZ is) (NP (NP (DT the) (JJ common) (NN name)) (PP (IN of) (NP (NP (DT the) (NN substance)) (SBAR (WHNP (WP$ whose) (NNS molecules)) (S (DT each) (VP (VBZ consists) (PP (IN of) (NP (NP (NP (CD two) (NNS atoms)) (PP (IN of) (NP (DT the) (NN gas) (NN hydrogen)))) (CC and) (NP (NP (CD one) (NN atom)) (PP (IN of) (NP (DT the) (NN gas) (NN oxygen))))))))))))) (. ?)))
What is the common name of the substance whose molecules each consists of two atoms of the gas hydrogen and one atom of the gas oxygen?
(ROOT (S (PP (IN Within) (NP (DT a) (NN substance))) (, ,) (NP (NP (NNS atoms)) (SBAR (WHNP (WDT that)) (S (VP (VP (VBP collide) (ADVP (RB frequently))) (CC and) (VP (VBP move) (ADVP (RB independently)) (PP (IN of) (NP (CD one) (DT another)))))))) (VP (VBP are) (ADJP (ADJP (RBS most) (JJ likely)) (PP (IN in) (NP (DT a) (NN gas)))))))