(S (S (BASENP (PRP He)) (VP (VBD explained) (SBAR (S (NP (BASENP (NN two) (NNS treatments)) (PP (IN per) (BASENP (NN week)))) (VP (VBZ is) (ADVP (ADVP (ADVP (RBR more) (RB often)) (PP (IN than) (ADJP (JJ usual)))) (PP (IN for) (BASENP (DT the) (NN city))))))))) (PERIOD .))