Input (grade 12): It first ran in the daytime on NBC from March 30, 1964 until January 3, 1975; concurrently ran in a weekly syndicated version from September 9, 1974 to September 5, 1975; and later ran in a revival from October 2, 1978 to March 2, 1979. All of these versions were hosted by Art Fleming.
Output (grade 3): It was hosted by Art Fleming from 1964 to 1975 and from 1978 to 1979.