Complex sentence: Passing, was a common practice in the 18th and 19th centuries with people of mixed-race heritage assimilating into the white majority during times when legal and social conventions of hypodescent classified the person as a minority, subjecting them to racial segregation and discrimination.
Split into simpler sentences: Passing, was a common practice in the 18th and 19th centuries. The term was used to describe a person of mixed-race heritage assimilating into the white majority during times when legal and social conventions of hypodescent classified the person as a minority, subject to racial segregation and discrimination.