Song is related to Ear. Ear is related to Sense. Sense is related to Vision. Vision is a synonym of Envision. 
Tree can be used for Refuge. you are likely to find Ground in/at/on Tree. Ground is related to Sky. Sky is related to Day. 
Song <--RelatedTo--> Ear <--RelatedTo--> Sense <--RelatedTo--> Vision <--Synonym--> Envision 
Refuge <--UsedFor-- Tree <--AtLocation-- Ground <--RelatedTo--> Sky <--RelatedTo--> Day 