Table: election_results_1998
Columns: district
incumbent
party
first_elected
results
candidates

Question: When was the incumbent Sherrod Brown first elected? 
SQL: SELECT MAX("first_elected") FROM election_results_1998 WHERE "incumbent" = 'Sherrod Brown'

Question: What was the result of the election in which the incumbent was first elected in 1984?
SQL: SELECT "results" FROM election_results_1998 WHERE "first_elected" = 1984

Question: Which incumbent was first elected in 1972? 
SQL: SELECT "incumbent" FROM election_results_1998 WHERE "first_elected" = 1972

Question: Tony P. Hall was the incumbent in the race between what two candidates? 
SQL: SELECT "candidates" FROM election_results_1998 WHERE "incumbent" = 'Tony P. Hall'

Question: In which district is the incumbent Marcia C. Kaptur? 
SQL: SELECT "district" FROM election_results_1998 WHERE "incumbent" = 'Marcia C. Kaptur'