Complex sentence: In 1907, Méliès created three new illusions for the stage and performed them at the Théâtre Robert-Houdin, while he continued producing a steady stream of films, including "Under the Seas", and a short version of Shakespeare's "Hamlet".
Split into simpler sentences: In 1907, Méliès created three new illusions for the stage and performed them at the Théâtre Robert-Houdin. He also continued a steady output of films, including "Under the Seas" and a short version of Shakespeare's "Hamlet".