8632
Included among these were his secretary , Ahmad ibn al-Khasib , who became vizier , and Wasif , a senior Turkish general who had likely been heavily involved in al-Mutawakkil 's murder .
 ibn
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 ibn