CREATE TABLE table_28852 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" CLOB, "Result" CLOB, "Candidates" CLOB)

Name the candidates for new york 21
SELECT "Candidates" FROM table_28852 WHERE "District" = 'New York 21'
SELECT "Candidates" FROM "table_28852" WHERE "District" = 'New York 21'