Want is a synonym of Must. Must is related to Compelling. 
Restore is a synonym of Repair. Repair is related to Tool. Gang is a type of Tool. Gang is related to Tough. 
Want <--Synonym--> Must <--RelatedTo--> Compelling 
Restore <--Synonym--> Repair <--RelatedTo--> Tool <--IsA-- Gang <--RelatedTo--> Tough 