CREATE TABLE table_18219 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "Elected" FLOAT, "Status" TEXT, "Opponent" TEXT)

What year was incumbent Martin Lancaster elected?
SELECT MIN("Elected") FROM table_18219 WHERE "Incumbent" = 'Martin Lancaster'
SELECT MIN("Elected") FROM "table_18219" WHERE "Incumbent" = 'Martin Lancaster'