2757
to prevent rust , etc. , the slug c is enclosed in a glass envelope before being sealed into the tap .
 slug, glass envelope
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:
 slug, glass envelope