35073
The Löwenheim–Skolem theorems tell us that if we restrict ourselves to first-order logic , any axiom system for the reals admits other models , including both models that are smaller than the reals and models that are larger .
 Löwenheim–Skolem
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Löwenheim–Skolem