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Starting about 1877 , two great railroad developers , William H. Vanderbilt and Jay Gould , began competing for the railroad traffic along the south shore of the Great Lakes .
 William H. Vanderbilt, Jay Gould, Great Lakes
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 William H. Vanderbilt, Jay Gould, Great Lakes