( However ( , ( ( if ( you ( ( find ( ( ( ( the book ) `` ) ( ( The Lives ) ( of Birds ) ) ) '' ) ) ( by Attenborough ) ) ) ) ( , ( he ( ( ( explains ( dimorphism ( of ( many ( bird species ) ) ) ) ) ( very well ) ) . ) ) ) ) ) )
(ROOT (S (ADVP (RB However)) (, ,) (SBAR (IN if) (S (NP (PRP you)) (VP (VBP find) (S (NP (DT the) (NN book)) (`` ``) (NP (NP (DT The) (NNS Lives)) (PP (IN of) (NP (NNP Birds)))) ('' '')) (PP (IN by) (NP (NNP Attenborough)))))) (, ,) (NP (PRP he)) (VP (VBZ explains) (NP (NP (NN dimorphism)) (PP (IN of) (NP (JJ many) (NN bird) (NNS species)))) (ADVP (RB very) (RB well))) (. .)))
However, if you find the book "The Lives of Birds" by Attenborough, he explains dimorphism of many bird species very well.
(ROOT (S (NP (NP (JJ Many) (NNS species)) (PP (IN of) (NP (NP (NNS birds)) (PP (IN in) (NP (JJ new) (NN england)))))) (VP (VBP fly) (ADVP (RB south) (PP (IN for) (NP (DT the) (NN winter) (NNS months)))) (S (VP (TO to) (VP (VB find) (NP (DT an) (NN environment)) (PP (IN with) (NP (JJR more) (NN food))))))) (. .)))