_:vb50934954 . _:vb50934954 . _:vb50934954 ":arcc045b397" . _:vb50934954 . _:vb50934954 . . "chemical entity role"@en . . "SIO_000795" . . _:vb50934954 . "A chemical role is a processual role held by a chemical entity."@en . .