Question: Who were the candidates in district Wisconsin 4?
SQL: SELECT "Candidates" FROM "1-1341453-51" WHERE "District" = 'Wisconsin 4';

Question: Who's the incumbent in the district that first elected in 1969?
SQL: SELECT "Incumbent" FROM "1-1341453-51" WHERE "First elected" = 1969.0;

Question: Who's the incumbent of district Wisconsin 5?
SQL: SELECT "Incumbent" FROM "1-1341453-51" WHERE "District" = 'Wisconsin 5';