Complex sentence: The northern part of the neighborhood is coextinsive with King County census tract 88 which has a population of 3,506 that is 50.8% Black making it the only census tract in the entire Pacific Northwest with an African-American majority population.
Split into simpler sentences: The northern part of the neighborhood is coextinsive with King County census tract 88. It has a population of 3,506 and is 50.8% Black making it the only census tract in the entire Pacific Northwest with an African-American majority population.