one thing you do when you Eating is Chew. Bread can be used for Eating. Bread is related to Carbohydrate. 
Task is related to Due. Due is related to Must. 
Chew <--HasSubevent-- Eating <--UsedFor-- Bread <--RelatedTo--> Carbohydrate 
Task <--RelatedTo--> Due <--RelatedTo--> Must 