CREATE TABLE table_18528 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

What party does sid simpson represent?
SELECT "Party" FROM table_18528 WHERE "Incumbent" = 'Sid Simpson'
SELECT "Party" FROM "table_18528" WHERE "Incumbent" = 'Sid Simpson'