Method is related to Boil. Boil is related to Large. Large is related to Population. Population is related to Demographic. 
Music is related to Tone. Tone is a synonym of Strengthen. Strengthen is a synonym of Comfort. 
Method <--RelatedTo--> Boil <--RelatedTo--> Large <--RelatedTo--> Population <--RelatedTo--> Demographic 
Music <--RelatedTo--> Tone <--Synonym--> Strengthen <--Synonym--> Comfort 