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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def txt2mecab(text, **kwargs):
    ''' Use mecab to parse one sentence '''
    mecab_out = _internal_mecab_parse(text, **kwargs).splitlines()
    tokens = [MeCabToken.parse(x) for x in mecab_out]
    return MeCabSent(text, tokens)