Input (grade 13): A national park in the Alligator River region was proposed as early as 1965, but took until 1978 for the Australian Government to make arrangements to acquire the titles over various tracts of land that now constitute Kakadu National Park.
Output (grade 9): A national park in the Alligator River region was proposed as early as 1965. In 1978 the Australian Government took over the titles of various pieces of land that now makes up Kakadu National Park.