( ( ( describe ( ( complex ( crystal structures ) ) ( in relation ) ) ) ( to ( ( the nature ) ( of ( the ( component species ) ) ) ) ) ) . )
(ROOT (S (VP (VB describe) (NP (NP (JJ complex) (NN crystal) (NNS structures)) (PP (IN in) (NP (NN relation)))) (PP (TO to) (NP (NP (DT the) (NN nature)) (PP (IN of) (NP (DT the) (NN component) (NN species)))))) (. .)))
describe complex crystal structures in relation to the nature of the component species.
(ROOT (S (NP (DT A) (NN mineral)) (VP (VBZ is) (VP (VBN described) (PP (IN as) (NP (NP (DT a) (JJ solid) (JJ natural) (NN material)) (PP (IN with) (NP (DT a) (NN crystal) (NN structure))))))) (. .)))