Table: election_results_1918_2
Columns: district
incumbent
party
first_elected
result
candidates

Question: Which party was the incumbent from when the cadidates were henry e. barbour (r) 52.1% henry hawson (d) 47.9%?  Answer: Democratic
SQL: SELECT COUNT("party") FROM election_results_1918_2 WHERE "candidates" = 'Henry E. Barbour (R) 52.1% Henry Hawson (D) 47.9%'

Question: Which district was the race between john i. nolan (r) 87% thomas f. feeley (s) 13%?
SQL: SELECT "district" FROM election_results_1918_2 WHERE "candidates" = 'John I. Nolan (R) 87% Thomas F. Feeley (S) 13%'

Question: What was the net seat gain in the race john a. elston (r) 88.4% luella twining (s) 11.6%?
SQL: SELECT "result" FROM election_results_1918_2 WHERE "candidates" = 'John A. Elston (R) 88.4% Luella Twining (S) 11.6%'

Question: Which District was the incumbent Julius Kahn from?  Answer:  California 4th district
SQL: SELECT COUNT("district") FROM election_results_1918_2 WHERE "incumbent" = 'Julius Kahn'

Question: What was the result of the election when Clarence F. Lea was the incumbent?
SQL: SELECT "result" FROM election_results_1918_2 WHERE "incumbent" = 'Clarence F. Lea'