Instructional is related to Sign. Sign is related to Shape. Shape is a synonym of Pattern. 
Chain can be used for Secure. Chain is a type of Unit. Gang is a type of Unit. Gang is related to Blood. 
Instructional <--RelatedTo--> Sign <--RelatedTo--> Shape <--Synonym--> Pattern 
Secure <--UsedFor-- Chain --IsA--> Unit <--IsA-- Gang <--RelatedTo--> Blood 