293
 His name was restored only in the mid-1980 's , when Mikhail Gorbachev , citing Khrushchev as a mentor , began the liberal changes that ultimately brought about the collapse of the Soviet Union in 1991 . 
 nationality: Mikhail Gorbachev, Soviet Union
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: nationality, country capital, place of death, children, location contains, place of birth, place lived, administrative division of country, country of administrative divisions, company, neighborhood of, company founders 
Text: {0} 
 Entity Pairs:  Mikhail Gorbachev, Soviet Union 
Answer:
 nationality: Mikhail Gorbachev, Soviet Union