Fluid is related to Dance. Dance is related to Break. Break is related to Relax. Sleep requires Relax. 
Edge is related to Tip. Tip is a type of Remove. String is a type of Remove. String is related to Nest. 
Fluid <--RelatedTo--> Dance <--RelatedTo--> Break <--RelatedTo--> Relax <--HasPrerequisite-- Sleep 
Edge <--RelatedTo--> Tip --IsA--> Remove <--IsA-- String <--RelatedTo--> Nest 