Definition: In this task, you will be presented with a text and a pronoun. You should write the name that the pronoun refers to. Position of the pronoun in the text is showed within two "_"s.
Input: The Kit*b al-Hayaw*n (**** *******, English: Book of Animals) is a 9th-century Arabic translation of History of Animals: 1--10, On the Parts of Animals: 11--14, and Generation of Animals: 15--19. The book was mentioned by Al-Kind* (d. 850), and commented on by Avicenna (Ibn S*n*) in _his_ The Book of Healing. <sep>, Pronoun: his

Ibn S*n*