7641
The 1.6-mile Black Heritage Trail in the Beacon Hill neighborhood commemorates Boston 's contribution to African-American history .
 neighborhood of: Beacon Hill, Boston; location contains: Boston, Beacon Hill
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:  Beacon Hill, Boston; Boston, Beacon Hill 
Answer:
 neighborhood of: Beacon Hill, Boston; location contains: Boston, Beacon Hill