parseStatement :: CharParser st Statement
parseStatement = fmap BaseStatement parseBase
    <|> fmap PrefixStatement parsePrefix <|> fmap Statement parseTriples
parseStatement :: CharParser st Statement
parseStatement = fmap BaseStatement parseBase
    <|> fmap PrefixStatement parsePrefix <|> fmap Statement parseTriples
parseStatement = fmap BaseStatement parseBase
    <|> fmap PrefixStatement parsePrefix <|> fmap Statement parseTriples