117534
In 1877 , the Florence , El Dorado , and Walnut Valley Railroad Company built a branch line from Florence to El Dorado , in 1881 it was extended to Douglass , and later to Arkansas City .
 Florence, El Dorado, Florence, El Dorado, Douglass, Arkansas City
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Florence, El Dorado, Florence, El Dorado, Douglass, Arkansas City