196067
It has a total of 27 stations along its 19.3 kilometre ( 11 mile ) length , constructed almost entirely underground , and is located primarily along the axis formed by the Avenida Libertador General Bernardo O'Higgins ( Libertador General Bernardo O'Higgins Avenue , also known as the “ Alameda ” ) , Providencia Avenue and Apoquindo Avenue .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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