Task: Explanation
Input (English): De Historia Piscium, Latin for "The History of Fish," was a scientific book written by Francis Willughby and published by the Royal Society in 1686. It was unpopular and sold poorly, causing severe strain on the finances of the society. This resulted in the society being unable to meet its promise to finance the publication of Newton's "Philosophiae Naturalis Principia Mathematica" (""Mathematical Principles of Natural Philosophy"", better known simply as "Principia"), leaving this to Edmond Halley, who was then the clerk of the society. After Halley had personally financed the publication of "Principia", he was informed that the society could no longer afford to provide him the promised annual salary of £50. Instead, Halley was paid with left-over copies of "De Historia Piscium". Question:  the Royal Society was unable to meet its promise to finance the publication of Newton's "Philosophiae Naturalis Principia Mathematica" and let this to the clerk of the society who was best known for computing what? Answer: the orbit of Halley's Comet
Output (English): De Historia Piscium, Latin for The History of Fish, was a scientific book written by Francis Willughby and published by the Royal Society in 1686.