Must is related to Very. Very is a synonym of Way. 
Mask entails/necessarily involves Cook. Cook is a synonym of Burn. Burn is a type of Waste. Waste is related to Human. 
Must <--RelatedTo--> Very <--Synonym--> Way 
Mask --Entails--> Cook <--Synonym--> Burn --IsA--> Waste <--RelatedTo--> Human 