40116
Although Massachusetts elected Edward W. Brooke , an African-American , attorney general in 1962 and senator in 1966 and 1972 , court-ordered desegregation in the 1970s opened an ugly chapter in Boston 's racial history .
 location contains: Massachusetts, Boston
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:  Massachusetts, Boston 
Answer:
 location contains: Massachusetts, Boston