Best is related to Rating. Rating is related to Fail. Fail is related to Disappointment. Frustration is a type of Disappointment. 
Relief is related to Mountain. Mountain is related to Cave. 
Best <--RelatedTo--> Rating <--RelatedTo--> Fail <--RelatedTo--> Disappointment <--IsA-- Frustration 
Relief <--RelatedTo--> Mountain <--RelatedTo--> Cave 