74760
In 2006 , a physics professor at the University of Central Florida wrote a paper arguing that it is mathematically impossible for vampires to exist , based on geometric progression .
 University of Central Florida
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:
 University of Central Florida