sentence: Similarly , a person may refer to close friends of one 's parents as `` aunt '' or `` uncle , '' or may refer to close friends as `` brother '' or `` sister , '' using the practice of fictive kinship .
question: how is something practiced _ _ _ ?
answers: a person may refer to close friends of one 's parents as `` aunt '' or `` uncle , '' may refer to close friends as `` brother '' or `` sister , ''