_:vb50821428 . . "Compositing and Blending Level 1" . _:vb50821425 . _:vb50821425 "Rik Cabanier" . . "2015-03-17" . . . _:vb50821428 . . _:vb50821427 . _:vb50821426 "Nikos Andronikos" . _:vb50821426 . . _:vb50821428 . . _:vb50821425 . "2015-01-13" . _:vb50821427 . _:vb50821426 . _:vb50821427 .