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External Data Source

Source

Regular Expression
(([Gg]rand)?([Ff]ather|[Mm]other|mom|pop|son|daughter|parent|((p|m)a)|uncle|aunt)s?)|(([cC]ousin)?((?<=[cC]ousin)\s+(?=brother|sister))?(?<siblings>brother|sister)?((?<=brother|sister)s?)?)