CREATE TABLE table_61824 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Results" CLOB)

Incumbent John Sullivan has what as biggest first elected?
SELECT MAX("First elected") FROM table_61824 WHERE "Incumbent" = 'john sullivan'
SELECT MAX("First elected") FROM "table_61824" WHERE "Incumbent" = 'john sullivan'