Complex sentence: Japanese wrestlers sent to Mexico, where the wrestling mask was the rule, adopted mask-based personae; examples were Osamu Matsuda becoming El Samurai, Yoshihiro Asai becoming Ultimo Dragon, and Masanori Murakawa becoming Great Sasuke.
Split into simpler sentences: Japanese wrestlers sent to Mexico, where the wrestling mask was the rule, adopted mask-based personae. Examples were Osamu Matsuda becoming El Samurai, Yoshihiro Asai becoming Ultimo Dragon, and Masanori Murakawa becoming Great Sasuke.