Task: Explanation
Input (English): Professor James Moriarty is a fictional character and the main antagonist in some of the Sherlock Holmes stories written by Sir Arthur Conan Doyle. Moriarty is a criminal mastermind whom Holmes describes as the "Napoleon of crime". Doyle lifted the phrase from a Scotland Yard inspector who was referring to Adam Worth, a real-life criminal mastermind and one of the individuals upon whom the character of Moriarty was based. The character was introduced primarily as a narrative device to enable Doyle to kill Sherlock Holmes, and only featured in two of the Sherlock Holmes stories. However, in many adaptations, he has been given a greater prominence and treated as Holmes' archenemy. Question: Which main antagonist in some of the Sherlock Holmes stories was holmes old arch-enemy, in Sherlock Holmes - The Musical Answer: Professor James Moriarty
Output (English): Professor James Moriarty is a fictional character and the main antagonist in some of the Sherlock Holmes stories written by Sir Arthur Conan Doyle.