CREATE TABLE table_28909 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" CLOB, "Result" CLOB, "Candidates" CLOB)

Which district did William A. Burwell (Dr) belong to?
SELECT "District" FROM table_28909 WHERE "Candidates" = 'William A. Burwell (DR)'
SELECT "District" FROM "table_28909" WHERE "Candidates" = 'William A. Burwell (DR)'