(S (S (BASENP (NNPS Wikis)) (VP (VBP are) (NP (BASENP (ADJP (RB openly) (JJ editable)) (NNS websites)) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (VP (ADVP (RB often)) (VP (VBN used) (S (VP (TO to) (VP (VB create) (BASENP (NN knowledge) (NNS bases))))))))))))) (PERIOD .))