Complex sentence: The 19th-century poster for Pablo Fanque's Circus Royal references performance on trampoline, though the device is thought to have been more like a springboard than the fabric-and-coiled-springs apparatus presently in use.
Split into simpler sentences: The 19th-century poster for Pablo Fanque's Circus Royal refers to performance on trampoline. The device is thought to have been more like a springboard than the fabric-and-coiled-springs apparatus presently in use.