The first is that I find their interpretation of the evidence often skewed; the second is that while adjustment to lexicon, which they have always strongly advocated, is one thing, modification of grammar is another.
( ( ( ( ( The first ) ( is ( that ( I ( find ( ( their interpretation ) ( of ( ( the evidence ) ( often skewed ) ) ) ) ) ) ) ) ) ; ) ( ( the second ) ( is ( that ( ( while ( ( ( ( ( adjustment ( to lexicon ) ) , ) ( which ( they ( ( have always ) ( strongly advocated ) ) ) ) ) , ) ( is ( one thing ) ) ) ) ( , ( ( modification ( of grammar ) ) ( is another ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (DT The) (JJ first)) (VP (VBZ is) (SBAR (IN that) (S (NP (PRP I)) (VP (VBP find) (NP (NP (PRP$ their) (NN interpretation)) (PP (IN of) (NP (NP (DT the) (NN evidence)) (ADJP (RB often) (JJ skewed)))))))))) (: ;) (S (NP (DT the) (NN second)) (VP (VBZ is) (SBAR (IN that) (S (SBAR (IN while) (S (NP (NP (NN adjustment) (TO to) (NN lexicon)) (, ,) (SBAR (WHNP (WDT which)) (S (NP (PRP they)) (VP (VBP have) (ADVP (RB always)) (VP (ADVP (RB strongly)) (VBN advocated))))) (, ,)) (VP (VBZ is) (NP (CD one) (NN thing))))) (, ,) (NP (NP (NN modification)) (PP (IN of) (NP (NN grammar)))) (VP (VBZ is) (NP (DT another))))))) (. .)))
In my opinion the way they interpreted the evidence is skewed.
( ( In ( ( my opinion ) ( the way ) ) ) ( they ( ( interpreted ( ( the evidence ) ( is skewed ) ) ) . ) ) )
(ROOT (S (PP (IN In) (NP (NP (PRP$ my) (NN opinion)) (NP (DT the) (NN way)))) (NP (PRP they)) (VP (VBD interpreted) (SBAR (S (NP (DT the) (NN evidence)) (VP (VBZ is) (ADJP (JJ skewed)))))) (. .)))