. "chemical-related"@en . . _:b1 . _:b1 "2011-11-24" . _:b1 "foba" . _:b2 . _:b2 "foba" . _:b2 "2011-11-24" . "chemical-related"@en . _:b4 . _:b4 . _:b4 _:b5 . _:b5 . _:b5 . _:b5 . _:b4 .