1994
In a 2005 paper published in " Nature " , as part of their investigation into global catastrophic risks , MIT physicist Max Tegmark and Oxford philosopher Nick Bostrom calculate the natural risks of the destruction of the Earth at less than 1 per gigayear from all events , including a transition to a lower vacuum state .
 MIT, Max Tegmark, Oxford, Nick Bostrom
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 MIT, Max Tegmark, Oxford, Nick Bostrom