_:vb50938531 . _:vb50938531 . _:vb50938531 "url:https://www.ncbi.nlm.nih.gov/pubmed/19646677"^^ . _:vb50938531 "url:http://en.wikipedia.org/wiki/Specific_language_impairment"^^ . _:vb50938531 . _:vb50938531 . _:vb50938531 "A language disorder characterized by difficulty in language acquisition despite otherwise normal development and in the absence of any obvious explanatory factors."^^ . _:vb50938531 . _:vb50938531 .