Table: election_results_1946
Columns: district
incumbent
party
first_elected
result
candidates

Question: What district is incumbent melvin price from?
SQL: SELECT "district" FROM election_results_1946 WHERE "incumbent" = 'Melvin Price'

Question: What district is incumbent sid simpson from?
SQL: SELECT "district" FROM election_results_1946 WHERE "incumbent" = 'Sid Simpson'