( ( Based ( on ( these ( two energies ) ) ) ) ( , ( ( decide ( if ( ( the collision ) ( is ( ( elastic or ) inelastic ) ) ) ) ) . ) ) )
(ROOT (S (PP (VBN Based) (PP (IN on) (NP (DT these) (CD two) (NNS energies)))) (, ,) (VP (VB decide) (SBAR (IN if) (S (NP (DT the) (NN collision)) (VP (VBZ is) (ADJP (JJ elastic) (CC or) (JJ inelastic)))))) (. .)))
Based on these two energies, decide if the collision is elastic or inelastic.
(ROOT (S (SBAR (IN Because) (S (NP (NNS collisions)) (VP (VBP are) (ADJP (JJ elastic))))) (, ,) (NP (NN energy)) (VP (MD can) (VP (VB be) (VP (VBN transferred) (PP (IN between) (NP (NNS molecules))) (PP (IN during) (NP (PRP them))))))))