Complex sentence: His parents were Tomás Campeche (1701--1780), a freed slave born in Puerto Rico, and María Jordán y Marqués from the Canary Islands; due to his mixed descent, he was labelled as a mulatto, a common term during his time.
Split into simpler sentences: His parents were Tomás Campeche (1701--1780), a freed slave born in Puerto Rico, and María Jordán y Marqués from the Canary Islands. Because of this mixed descent, he was identified as a mulatto, a common term during his time.