3201
in philosophy , the brain in a vat is an element used in a variety of thought experiments intended to draw out certain features of our ideas of knowledge .
 brain, vat
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:
 brain, vat