21397
Not long after we had arrived in Buenos Aires , we crossed one of the bridges connecting the Puerto Madero district to the rest of the enormous eastward-spreading city and began to stroll along the quay .
 location contains: Buenos Aires, Puerto Madero; neighborhood of: Puerto Madero, Buenos Aires
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: Buenos Aires, Puerto Madero; neighborhood of: Puerto Madero, Buenos Aires