Input question: What forced Nijinsky to retire at a comparatively young age from ballet?

Output answer: mental illness

Input question: Who was the author of the literary work 'A Mask presented at Ludlow Castle, 1634' a work more commonly known as 'Comus'?

Output answer: john milton

Input question: Myxomatosis is a viral disease affecting which creatures?

Output answer: rabbits

Input question: True Cashmere is a product of which kind of animal?

Output answer:
cashmere goat