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The expedition was led by Professor William Johnson Sollas of the University of Oxford and included Professor Edgeworth David and Walter George Woolnough of the University of Sydney .
 William Johnson Sollas, University of Oxford, Edgeworth David, Walter George Woolnough, University of Sydney
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 Johnson Sollas, University of Oxford, Edgeworth David, Walter George Woolnough, University of Sydney