In this task, you are given a question and a context passage. You have to answer the question based on the given passage.

Ex Input:
What did his thinking conflict with?, Context: In the early 11th century, the Muslim physicist Ibn al-Haytham (Alhacen or Alhazen) discussed space perception and its epistemological implications in his Book of Optics (1021), he also rejected Aristotle's definition of topos (Physics IV) by way of geometric demonstrations and defined place as a mathematical spatial extension. His experimental proof of the intromission model of vision led to changes in the understanding of the visual perception of space, contrary to the previous emission theory of vision supported by Euclid and Ptolemy. In "tying the visual perception of space to prior bodily experience, Alhacen unequivocally rejected the intuitiveness of spatial perception and, therefore, the autonomy of vision. Without tangible notions of distance and size for correlation, sight can tell us next to nothing about such things."

Ex Output:
Aristotle's definition of topos

Ex Input:
Who found that physical action cannot take on an arbitrary value?, Context: Classical statistical mechanics requires the existence of h (but does not define its value). Eventually, following upon Planck's discovery, it was recognized that physical action cannot take on an arbitrary value. Instead, it must be some multiple of a very small quantity, the "quantum of action", now called the Planck constant. Classical physics cannot explain this fact. In many cases, such as for monochromatic light or for atoms, this quantum of action also implies that only certain energy levels are allowed, and values in between are forbidden.

Ex Output:
Planck

Ex Input:
Hubert P. Wrote a song that made the author what?, Context: Other notable Old Etonians include scientists Robert Boyle, John Maynard Smith, J. B. S. Haldane, Stephen Wolfram and the 2012 Nobel Prize in Physiology or Medicine winner, John Gurdon; Beau Brummell; economists John Maynard Keynes and Richard Layard; Antarctic explorer Lawrence Oates; politician Alan Clark; entrepreneur, charity organiser and partner of Adele, Simon Konecki; cricket commentator Henry Blofeld; explorer Sir Ranulph Fiennes; adventurer Bear Grylls; composers Thomas Arne, George Butterworth, Roger Quilter, Frederick Septimus Kelly, Donald Tovey, Thomas Dunhill, Lord Berners, Victor Hely-Hutchinson, and Peter Warlock (Philip Heseltine); Hubert Parry, who wrote the song Jerusalem and the coronation anthem I was glad; and musicians Frank Turner and Humphrey Lyttelton.

Ex Output:
glad