Supply is related to Crop. Crop is related to Concern. Matter is a type of Concern. Matter is related to Block. 
Purpose is related to Scare. Scared is derived from Scare. 
Supply <--RelatedTo--> Crop <--RelatedTo--> Concern <--IsA-- Matter <--RelatedTo--> Block 
Purpose <--RelatedTo--> Scare <--DerivedFrom-- Scared 