Simplify the following text for a Grade 6 native English-speaking person.
Original: According to this story , RyÅ `` jin wanted to eat monkey 's liver ( in some versions of the story , to heal an incurable rash ) , and sent the jellyfish to get him a monkey .
Simplified: This story tells that once , RyÅ `` jin wanted to eat monkey 's liver , and sent the jellyfish to get him a monkey .