CREATE TABLE table_23274 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

How many different pairs of candidates were there for the district first elected in 1988?
SELECT COUNT("Candidates") FROM table_23274 WHERE "First elected" = '1988'
SELECT COUNT("Candidates") FROM "table_23274" WHERE "First elected" = '1988'