Table: election_results_1990
Columns: district
incumbent
party
elected
status
opponent

Question: What are the locations where the year of election is 1980?
SQL: SELECT "district" FROM election_results_1990 WHERE "elected" = 1980

Question: What location is Vin Weber from?
SQL: SELECT "district" FROM election_results_1990 WHERE "incumbent" = 'Vin Weber'