5600
and for now , it ' s 250 days , which seems to be the maximum for astronauts in space anyway .
 astronauts in space, space
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 astronauts in space, space