Table: ncaa_basketball_tournament_1993
Columns: region
host
venue
city
state

Question: What region is the host university of southern california located?
SQL: SELECT "region" FROM ncaa_basketball_tournament_1993 WHERE "host" = 'university of southern california'

Question: In which state is the city of knoxville?
SQL: SELECT "state" FROM ncaa_basketball_tournament_1993 WHERE "city" = 'knoxville'

Question: Which city in Texas hosts the Frank Erwin center?
SQL: SELECT "city" FROM ncaa_basketball_tournament_1993 WHERE "state" = 'texas' AND "venue" = 'frank erwin center'

Question: In what region is the city of Austin?
SQL: SELECT "region" FROM ncaa_basketball_tournament_1993 WHERE "city" = 'austin'