(S (S (BASENP (NN Alcohol) (NN use) (NNS problems)) (VP (PRN (COMMA ,) (ADVP (RB however)) (COMMA ,)) (VP (VP (VBD were) (ADJP (RB equally) (JJ prevalent))) (ADVP (RB regardless) (PP (IN of) (BASENP (NN treatment) (NN outcome))))))) (PERIOD .))