[['school', 'location', 'mascot', 'enrollment', 'ihsaa class', 'county', 'year joined', 'previous conference'], ['bloomfield', 'bloomfield', 'cardinals', '358', 'aa', '28 greene', '1939', 'independents'], ['clay city', 'clay city', 'eels', '278', 'a', '11 clay', '1992', 'tri - river'], ['eastern greene', 'bloomfield', 'thunderbirds', '440', 'aa', '28 greene', '1962', 'none (new school)'], ['linton stockton', 'linton', 'miners', '404', 'aa', '28 greene', '1980', 'independents'], ['north central (farmersburg)', 'farmersburg', 'thunderbirds', '525', 'a', '77 sullivan', '2010', 'tri - river'], ['north daviess', 'elnora', 'cougars', '321', 'a', '14 daviess', '1986', 'blue chip conference'], ['shakamak', 'jasonville', 'lakers', '256', 'a', '28 greene', '1968', 'tri - river'], ['union (dugger)', 'dugger', 'bulldogs', '127', 'a', '77 sullivan', '1974', 'tri - river'], ['white river valley', 'switz city', 'wolverines', '273', 'a', '28 greene', '1990', 'none (new school)']]
most of the school in the Southwestern Indiana Conference were originally in the Tri - River Conference
most of the school in the [ENT] were originally in the [ENT] [ENT]