Question: what's the district with incumbent being Richard J. Welch
SQL: SELECT "District" FROM "1-1342359-5" WHERE "Incumbent" = 'Richard J. Welch';

Question: what's the districtwith party being Democratic
SQL: SELECT "District" FROM "1-1342359-5" WHERE "Party" = 'Democratic';

Question: what's the district with candidates being Harry Lane Englebright (R) Unopposed
SQL: SELECT "District" FROM "1-1342359-5" WHERE "Candidates" = 'Harry Lane Englebright (R) Unopposed';

Question:  how many candidates with district being California 7
SQL: SELECT COUNT("Candidates") FROM "1-1342359-5" WHERE "District" = 'California 7';

Question: what's the party with incumbent being William E. Evans
SQL: SELECT "Party" FROM "1-1342359-5" WHERE "Incumbent" = 'William E. Evans';