Due is related to Homework. Homework is related to Problem. Problem is a type of Request. Request is a synonym of Wish. 
one thing you do when you Help is Reward. Reward is related to Thank. you would Thank because Grateful. 
Due <--RelatedTo--> Homework <--RelatedTo--> Problem --IsA--> Request <--Synonym--> Wish 
Help --HasSubevent--> Reward <--RelatedTo--> Thank --MotivatedByGoal--> Grateful 