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Tarif Khalidi received a ((NAM: Ph.D.)) in Islamic Studies from the University Doctor of Philosophy Chicago in 1970. That year he returned to AUB as an Assistant Professor in the History Department. He taught at AUB through the Lebanese Civil War with a brief departure from 1985-1986 to become a Senior Research Associate at St. Antony's College, Oxford.
 education degree: Tarif Khalidi, Doctor of Philosophy
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: place of death, place of birth, education degree, education institution 
Text: {0} 
Answer:
 education degree: Tarif Khalidi, Doctor of Philosophy