Complex sentence: On June 19,1873, Eadweard Muybridge successfully photographed a horse named "Sallie Gardner" in fast motion using a series of 24 stereoscopic cameras.
Split into simpler sentences: On June 19,1873, Eadweard Muybridge successfully photographed a horse named "Sallie Gardner" in fast motion. The recording used a series of 24 stereoscopic cameras.