What is  counterproductive  is the notion that speakers of a language have to recognize semantic  they don't  recognize  it, they create it.
( ( What ( is ( counterproductive ( ( is ( the notion ) ) ( that ( ( speakers ( of ( a language ) ) ) ( have ( to ( recognize ( semantic ( they ( ( do n't ) ( recognize it ) ) ) ) ) ) ) ) ) ) ) ) ) ( , ( they ( ( create it ) . ) ) ) )
(ROOT (S (SBAR (WHNP (WP What)) (S (VP (VBZ is) (ADJP (JJ counterproductive) (SBAR (S (VP (VBZ is) (NP (DT the) (NN notion)) (SBAR (IN that) (S (NP (NP (NNS speakers)) (PP (IN of) (NP (DT a) (NN language)))) (VP (VBP have) (S (VP (TO to) (VP (VB recognize) (ADJP (JJ semantic) (SBAR (S (NP (PRP they)) (VP (VBP do) (RB n't) (VP (VB recognize) (NP (PRP it)))))))))))))))))))) (, ,) (NP (PRP they)) (VP (VBP create) (NP (PRP it))) (. .)))
Speakers of a language create semantic.
( ( Speakers ( of ( a language ) ) ) ( ( create semantic ) . ) )
(ROOT (S (NP (NP (NNS Speakers)) (PP (IN of) (NP (DT a) (NN language)))) (VP (VBP create) (ADJP (JJ semantic))) (. .)))