2425
in the most common form of such an attack , called ischemic stroke , the blockage comes from a blood clot that develops in one of the brain 's blood vessels .
 blockage, clot
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:
 blockage, clot