88948
In 2011 , Pfizer , one of the last major pharmaceutical companies developing new antibiotics , shut down its primary research effort , citing poor shareholder returns relative to drugs for chronic illnesses .
 Pfizer
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Pfizer