( ( ( Three ( Different Isomers ) ) ( in ( the ( Same Crystal ) ) ) ) . )
(ROOT (NP (NP (CD Three) (JJ Different) (NNS Isomers)) (PP (IN in) (NP (DT the) (JJ Same) (NN Crystal))) (. .)))
Three Different Isomers in the Same Crystal.
(ROOT (S (NP (NP (NNS Alkenes)) (PP (IN with) (NP (NP (DT the) (JJ same) (NNS atoms)) (PP (CC but) (NP (JJ different) (NNS shapes)))))) (VP (VBP are) (VP (VBN called) (NP (NNS isomers)))) (. .)))