( ( ( ( ( Fiddleheads ( should ( be ( easy ( to find ) ) ) ) ) , ) but ) ( ( ( the species ) ( of ( fern ( they represent ) ) ) ) ( is ( impossible ( to ( tell ( for ( most taxa ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNS Fiddleheads)) (VP (MD should) (VP (VB be) (ADJP (JJ easy) (S (VP (TO to) (VP (VB find)))))))) (, ,) (CC but) (S (NP (NP (DT the) (NN species)) (PP (IN of) (NP (NP (NN fern)) (SBAR (S (NP (PRP they)) (VP (VBP represent))))))) (VP (VBZ is) (ADJP (JJ impossible) (S (VP (TO to) (VP (VB tell) (PP (IN for) (NP (JJS most) (NN taxa))))))))) (. .)))
Fiddleheads should be easy to find, but the species of fern they represent is impossible to tell for most taxa.
(ROOT (S (NP (NP (DT The) (JJ first) (NNS leaves)) (PP (IN of) (NP (JJS most) (NNS ferns)))) (VP (VBP appear) (SBAR (S (VP (VBD curled) (PRT (RP up)) (PP (IN into) (NP (NNS fiddleheads))))))) (. .)))