15062
Martin van Creveld , a historian at Hebrew University of Jerusalem , says that soldiers in the dominant army often became demoralized by the frustrations of trying to defeat guerrillas .
 person of company: Martin van Creveld, Hebrew University of Jerusalem
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: ethnicity, place lived, geographic distribution, company industry, country of administrative divisions, administrative division of country, location contains, person of company, profession, ethnicity of people, company shareholder among major shareholders, sports team of location, religion, neighborhood of, company major shareholders, place of death, nationality, children, company founders, company founded place, country of capital, company advisors, sports team location of teams, place of birth 
Text: {0} 
Answer:
 person of company: Martin van Creveld, Hebrew University of Jerusalem