Chart is related to Display. Display is related to Gallery. Gallery is related to Section. Episode is a type of Section. 
Undertake is a synonym of Tackle. Tackle is a different concept from Guard. Guard is a different concept from Police. Police is a synonym of Patrol. 
Chart <--RelatedTo--> Display <--RelatedTo--> Gallery <--RelatedTo--> Section <--IsA-- Episode 
Undertake <--Synonym--> Tackle <--DistinctFrom--> Guard <--DistinctFrom--> Police <--Synonym--> Patrol 