unique(self)
unique(self) and count(self)==max(self)
is_empty(NUMBER_SQ001) or is_int(NUMBER_SQ001) and is_empty(NUMBER_SQ002) or is_int(NUMBER_SQ002) and is_empty(NUMBER_SQ003) or is_int(NUMBER_SQ003) and is_empty(NUMBER_SQ004) or is_int(NUMBER_SQ004)
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