CREATE TABLE table_28847 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

Who were the candidates if the incumbent was Henry Logan?
SELECT "Candidates" FROM table_28847 WHERE "Incumbent" = 'Henry Logan'
SELECT "Candidates" FROM "table_28847" WHERE "Incumbent" = 'Henry Logan'