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Rafi faced the opposition of the Saffarids under Amr , who had made his peace with the caliph in 879 and been recognized as governor of Khurasan and most of Iran , as well as the adventurer Abu Talha Mansur ibn Sharkab , who had briefly seized Nishapur in 876 – 878 and was now ruler of Merv .
 person: Amr; location: Khurasan; person: ibn; location: Nishapur; location: Merv
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Amr, Khurasan, ibn, Nishapur, Merv 
Answer:
 person: Amr; location: Khurasan; person: ibn; location: Nishapur; location: Merv