def get_sentence_break_property(value, is_bytes=False):
    """Get `SENTENCE BREAK` property."""

    obj = unidata.ascii_sentence_break if is_bytes else unidata.unicode_sentence_break

    if value.startswith('^'):
        negated = value[1:]
        value = '^' + unidata.unicode_alias['sentencebreak'].get(negated, negated)
    else:
        value = unidata.unicode_alias['sentencebreak'].get(value, value)

    return obj[value]
Get `SENTENCE BREAK` property.