30501
The paper , based on work carried out at the Massachusetts Eye and Ear Infirmary in Boston , was published in the November issue of Graefe 's Archive for Clinical and Experimental Ophthalmology .
 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