CREATE TABLE table_719 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

what is the district where the result is re-elected and the incumbent is richard kelly?
SELECT "District" FROM table_719 WHERE "Result" = 'Re-elected' AND "Incumbent" = 'Richard Kelly'
SELECT "District" FROM "table_719" WHERE "Incumbent" = 'Richard Kelly' AND "Result" = 'Re-elected'