Complex sentence: Villa's purported death mask was hidden at the Radford School in El Paso, Texas, until the 1970s, when it was sent to the Historical Museum of the Mexican Revolution in Chihuahua; other museums have ceramic and bronze representations that do not match this mask.
Split into simpler sentences: Villa's purported death mask was hidden at the Radford School in El Paso, Texas, until the 1970s, when it was sent to the Historical Museum of the Mexican Revolution in Chihuahua. Other museums have ceramic and bronze representations that do not match this mask.