(S (S (PP (IN At) (BASENP (NN present))) (S (BASENP (NNS patients)) (VP (VP (VBP pay) (BASENP (QP (RB around) (DOLLAR $) (NN 100)))) (PP (IN for) (BASENP (DT a) (JJ standard) (ADJP (NN 30) (NN minute)) (NN consultation)))))) (PERIOD .))