206829
According to the company , Excel Homes has built more than 28,000 modular homes in its climate-controlled plants in Liverpool , PA and Avis , PA , since its founding in 1984 .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 None