197810
According to Aldiss , the idea for the novel came from the Heisenberg uncertainty principle and its corollary that ' observation alters what is observed ' .
 Aldiss, Heisenberg
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Aldiss, Heisenberg