Premise: Riverside County , California , is one of fifty-eight counties in the U.S. state of California . Southern California . The region is traditionally described as eight counties , based on demographics and economic ties : Imperial , Los Angeles , Orange , Riverside , San Bernardino , San Diego , Santa Barbara , and Ventura . Southern California 's population encompasses seven metropolitan areas : the Los Angeles metropolitan area ( Los Angeles and Orange counties ) , the Inland Empire , ( Riverside and San Bernardino counties ) , the San Diego metropolitan area , the Oxnard -- Thousand Oaks -- Ventura metropolitan area , the Santa Barbara metropolitan area , the San Luis Obispo metropolitan area , and the El Centro area . The Los Angeles area has over 12 million inhabitants , while the Riverside-San Bernardino area has over 4 million inhabitants and the San Diego area has over 3 million inhabitants .
Hypothesis: Southern California has a county named Riverside.
Label: ENTAILMENT