(S (S (BASENP (DT A) (JJ random) (NN study)) (VP (VBD found) (NP (NP (NP (BASENP (ADJP (RB unusually) (JJ high)) (NNS rates)) (PP (IN of) (BASENP (JJ heterotrophic) (NNS bacteria)))) (PP (IN in) (BASENP (DT the) (JJ bottled) (NN water)))) (COMMA ,) (NP (NP (QP (ADVP (RBR more) (IN than)) (NN 500)) (NN cfu)) (COMMA ,) (NP (NP (BASENP (DT the) (JJ legal) (NN limit)) (VP (VBN set) (PP (IN by) (BASENP (NNP United) (NNPS States) (NNP Pharmacopeia))))) (PP (IN on) (SBAR (WHADVP (WRB how) (RB much)) (S (BASENP (NNS bacteria)) (VP (MD should) (VP (VB be) (ADJP (JJ present) (PP (IN in) (NP (BASENP (JJ drinking) (NN water)) (PP (IN in) (BASENP (NNP Canada)))))))))))))))) (PERIOD .))