CREATE TABLE table_18726 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

What district did James O'Connor belong to?
SELECT "District" FROM table_18726 WHERE "Incumbent" = 'James O''Connor'
SELECT "District" FROM "table_18726" WHERE "Incumbent" = 'James O''Connor'