CREATE TABLE table_55867 ("Name" TEXT, "Original Publisher" TEXT, "First Appearance" TEXT, "Year" FLOAT, "Date" TEXT)

What first appeared in 1966 in the comic X-2-Y?
SELECT "First Appearance" FROM table_55867 WHERE "Year" = '1966' AND "Name" = 'x-2-y'
SELECT "First Appearance" FROM "table_55867" WHERE "Name" = 'x-2-y' AND "Year" = '1966'