. "hadPrimarySource" . _:vb50857814 . "derivations" . _:vb98014 . _:vb50849241 . . . . . . "expanded" . . _:vb50857930 . . . _:vb50857855 . . . _:vb50849282 . "wasPrimarySourceOf" . _:vb50857889 . _:vb98055 . _:vb50849207 . _:vb50849166 . . .