CREATE TABLE table_794 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" CLOB, "Result" CLOB, "Candidates" CLOB)

How many different set of candidates were there when the incumbent was david e. finley?
SELECT COUNT("Candidates") FROM table_794 WHERE "Incumbent" = 'David E. Finley'
SELECT COUNT("Candidates") FROM "table_794" WHERE "Incumbent" = 'David E. Finley'