6843
But on Monday , Mr. Gladstone , 59 , who typically spends his free time collecting antique jukeboxes for his home in Potomac , an affluent Maryland suburb , was caught up in the political ferment sweeping the nation as he joined the throngs of immigrants demonstrating here .
 location contains: Maryland, Potomac
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "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} 
Answer:
 location contains: Maryland, Potomac