( ( Because ( of ( ( its simplicity ) ( as ( a tracer ) ) ) ) ) ( , ( however ( , ( ( this structure ) ( ( can ( be ( ( used directly ) ( to ( infer ( ( some ( gross aspects ) ) ( of ( stratospheric transport ) ) ) ) ) ) ) ) . ) ) ) ) ) )
(ROOT (S (PP (IN Because) (PP (IN of) (NP (NP (PRP$ its) (NN simplicity)) (PP (IN as) (NP (DT a) (NN tracer)))))) (, ,) (ADVP (RB however)) (, ,) (NP (DT this) (NN structure)) (VP (MD can) (VP (VB be) (VP (VBN used) (ADVP (RB directly)) (S (VP (TO to) (VP (VB infer) (NP (NP (DT some) (JJ gross) (NNS aspects)) (PP (IN of) (NP (JJ stratospheric) (NN transport)))))))))) (. .)))
Because of its simplicity as a tracer, however, this structure can be used directly to infer some gross aspects of stratospheric transport.
(ROOT (S (NP (DT A) (NN tracer)) (VP (VBZ is) (NP (NP (DT the) (NN name)) (PP (IN for) (NP (NP (DT a) (NN substance)) (SBAR (WHNP (WDT that)) (S (VP (MD can) (VP (VB be) (VP (VBN used) (S (VP (TO to) (VP (VB follow) (NP (NP (DT the) (NN pathway)) (PP (IN of) (NP (DT that) (NN substance)))) (PP (IN through) (NP (DT some) (NN structure))))))))))))))) (. .)))