Question: Name the incumbent for Lost renomination Republican hold
SQL: SELECT "Incumbent" FROM "1-19753079-4" WHERE "Result" = 'Lost renomination Republican hold';

Question: Name the result for first elected being 1992
SQL: SELECT "Result" FROM "1-19753079-4" WHERE "First elected" = 1992.0;

Question: Name the incumbent for Alabama 6
SQL: SELECT "Incumbent" FROM "1-19753079-4" WHERE "District" = 'Alabama 6';