CREATE TABLE table_72387 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

How many candidates were first elected in 1972?
SELECT COUNT("Candidates") FROM table_72387 WHERE "First elected" = '1972'
SELECT COUNT("Candidates") FROM "table_72387" WHERE "First elected" = '1972'