188868
Keir Dullea and Gary Lockwood star as the two astronauts on this voyage , with Douglas Rain as the voice of the sentient computer HAL 9000 who has full control over their spaceship .
 Keir Dullea, Gary Lockwood, Douglas Rain
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Keir Dullea, Gary Lockwood, Douglas Rain