8546
an american astronaut and russian cosmonaut are settling in at the international space station .
 american, russian, an american astronaut, russian cosmonaut, the international space station, 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:
 american, russian, an american astronaut, russian cosmonaut, the international space station, space