Table: election_results_1998_6
Columns: district
incumbent
party
first_elected
results
candidates

Question: Who were the candidates in district Wisconsin 4?
SQL: SELECT "candidates" FROM election_results_1998_6 WHERE "district" = 'Wisconsin 4'

Question: Who's the incumbent in the district that first elected in 1969?
SQL: SELECT "incumbent" FROM election_results_1998_6 WHERE "first_elected" = 1969

Question: Who's the incumbent of district Wisconsin 5?
SQL: SELECT "incumbent" FROM election_results_1998_6 WHERE "district" = 'Wisconsin 5'