Complex sentence: He also donates many of his hunting trophies for research purposes to the Museum of Natural History in Rome and to the Civic Museum of Natural History in Milan, prompting the city of Milan to honor him with the Grand Gold Medal of Merit in April of 1924.
Split into simpler sentences: He also donates many of his hunting trophies for research purposes to the Museum of Natural History in Rome and to the Civic Museum of Natural History in Milan. The latter prompting the city of Milan to honor him with the Grand Gold Medal of Merit in April of 1924.