110998
One of the speakers at the first conference , David Chalmers , co-organized some of the following ones , until the event became too far away from the scientific mainstream .
 David Chalmers
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:
 David Chalmers