Reading can cause/lead to Thought. Reading is related to Psychology. Psychology is related to Social. Social is related to Gang. 
Activity is related to Cry. Cry is related to Have. Sustain is a type of Have. 
Thought <--Causes-- Reading <--RelatedTo--> Psychology <--RelatedTo--> Social <--RelatedTo--> Gang 
Activity <--RelatedTo--> Cry <--RelatedTo--> Have <--IsA-- Sustain 