73766
Formed in 1968 by the merger of the New York Central Railroad and Pennsylvania Railroad ( and supplemented in 1969 by the New York , New Haven and Hartford Railroad ) , the PC was created with almost no plans to merge the varied corporate cultures , and the resulting company was a hopelessly entangled mess .
 New York Central Railroad, Pennsylvania Railroad, New York , New Haven and Hartford 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:
 New York Central Railroad, Pennsylvania Railroad, New York , New Haven and Hartford Railroad