Table: election_results_1906
Columns: district
incumbent
party
first_elected
result

Question: Which District has a First Elected of 1904 and an Incumbent of Duncan E. Mckinlay?
SQL: SELECT "district" FROM election_results_1906 WHERE "first_elected" = 1904 AND "incumbent" = 'duncan e. mckinlay'

Question: What's the highest First Elected with a Result of Re-elected and DIstrict of California 5?
SQL: SELECT MAX("first_elected") FROM election_results_1906 WHERE "result" = 're-elected' AND "district" = 'california 5'

Question: Which Incumbent has a District of California 8?
SQL: SELECT "incumbent" FROM election_results_1906 WHERE "district" = 'california 8'

Question: Which District has a Result of Re-elected and a First Elected of 1898?
SQL: SELECT "district" FROM election_results_1906 WHERE "result" = 're-elected' AND "first_elected" = 1898

Question: Which Incumbent has a District of California 5?
SQL: SELECT "incumbent" FROM election_results_1906 WHERE "district" = 'california 5'