(S (PP (IN On) (BASENP (NNP Friday))) (COMMA ,) (S (BASENP (NNP Clark)) (VP (VP (VBD posted) (PP (TO to) (BASENP (NNP Facebook)))) (S (VP (TO to) (VP (VP (VB explain) (BASENP (PRPD his) (NN decision))) (S (VP (VBG saying) (COMMA ,) (QT (DQL ``) (QTC (S (S (BASENP (PRP I)) (VP (ADVP (RB usually)) (VP (VP (VBP do) (RB n't)) (VP (VB post) (BASENP (JJ political) (NNS items)))))) (CONJP (COMMA ,) (CC but)) (S (BASENP (NN today)) (VP (VBZ is) (ADJP (JJ different))))) (PERIOD .)) (DQR ''))))))))))