CREATE TABLE table_22125 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Results" TEXT, "Candidates" TEXT)

How many people were first elected with an incument of diane watson?
SELECT COUNT("First elected") FROM table_22125 WHERE "Incumbent" = 'Diane Watson'
SELECT COUNT("First elected") FROM "table_22125" WHERE "Incumbent" = 'Diane Watson'