Complex sentence: On the December 19 episode of "Raw", Sin Cara returned to the heavyweight division in a match against Titus O'Neil, which ended in a no contest after Braun Strowman attacked both competitors.
Split into simpler sentences: On the December 19 episode of "Raw", Sin Cara faced Titus O'Neil, confirming his return to the heavyweight division. The match ended in a no contest after Braun Strowman attacked both competitors.