1038
the milky way , the galaxy of billions of stars that contains the solar system , has been devouring a much smaller galaxy for hundreds of millions of years , but until now the `` dwarf '' galaxy had been mistaken for a portion of the milky way itself .
 galaxy, stars
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: component whole, NA, instrument agency, member collection, cause effect, entity destination, content container, message topic, product producer, entity origin 
Text: {0} 
Answer:
 galaxy, stars