1971
bed sores ( also known as : pressure sores , decubitus ulcers or pressure ulcers ) are caused by pressure , which cuts off blood flow to parts of the body .
 bed sores, pressure
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:
 bed sores, pressure