CREATE TABLE table_28939 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" CLOB, "Result" CLOB, "Candidates" CLOB)

Name the number of first elected for john smith
SELECT COUNT("First elected") FROM table_28939 WHERE "Incumbent" = 'John Smith'
SELECT COUNT("First elected") FROM "table_28939" WHERE "Incumbent" = 'John Smith'