Necessary is related to Requirement. Requirement is related to Faith. Faith is related to Blind. Blind is related to Bat. 
Box is related to Object. Object is related to Bolt. 
Necessary <--RelatedTo--> Requirement <--RelatedTo--> Faith <--RelatedTo--> Blind <--RelatedTo--> Bat 
Box <--RelatedTo--> Object <--RelatedTo--> Bolt 