Complex sentence: During production, the crew used cel cameras dating as far back as 1938, and made Ivana Brlić-Mažuranić's title character a mouse, amid a roster of anthropomorphic animals.
Split into simpler sentences: During production, the crew used cel cameras dating as far back as 1938. They also made Ivana Brlić-Mažuranić's title character a mouse, amid a roster of anthropomorphic animals.