8640
I vividly recall a White House national security meeting in December 1985 , at which the president reported on his first '' get acquainted '' summit in Geneva with President Mikhail Gorbachev of the Soviet Union the previous month .
 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: 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} 
 Entity Pairs:  Mikhail Gorbachev, Soviet Union 
Answer:
 nationality: Mikhail Gorbachev, Soviet Union