Premise: The Pulitzer Prize for Photography was one of the American Pulitzer Prizes annually awarded for journalism. It was inaugurated in 1942 and replaced by two photojournalism prizes in 1968: the Pulitzer Prize for Feature Photography and "Pulitzer Prize for Spot News Photography". The latter was renamed for Pulitzer Prize for Breaking News Photography in 2000.
Hypothesis: From 1968 through 2000, there were 2 Pullitzer Prizes awarded annually for photography.