231365
Although the class B was designated for steam locomotives with the 0-6-0 wheel arrangement , these steam locomotives could not fit the tight and complex street , dockyard and industrial trackage the Pennsylvania Railroad had in its possession .
 Pennsylvania Railroad
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Pennsylvania Railroad