Input (grade 7): Pope Sixtus IV (July 21, 1414 - August 12, 1484), born Francesco della Rovere, was Pope from 1471 to 1484.
Output (grade 8): Pope Sixtus IV (July 21, 1414 - August 12, 1484), originally Francesco Della Rovere, was pope from 1471 to 1484.