(S (S (BASENP (JJ Popular) (JJ social) (NN networking) (NN website) (NNP Facebook)) (VP (VP (VP (VBD went) (PRT (RP down))) (PP (IN for) (BASENP (JJ unknown) (NNS upgrades)))) (COMMA ,) (S (VP (ADVP (RB possibly)) (VP (TO to) (VP (VB circumvent) (NP (BASENP (JJ multiple) (NNS holes)) (SBAR (WHNP (WDT that)) (S (VP (VBD were) (VP (VP (VBN published) (PP (IN in) (BASENP (DT a) (JJ white) (NN paper)))) (ADVP (RBR earlier))))))))))))) (PERIOD .))