6249
then the king handed the key to the queen , telling her , `` be warned that whoever lets the serpent escape will be hung '' .
 king, key
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:
 king, key