Wear is related to Watch. Crystal is part of Watch. 
Insurance is related to Coverage. Coverage is a type of Extent. Extent is related to Limit. Limit is related to Fast. 
Wear <--RelatedTo--> Watch <--PartOf-- Crystal 
Insurance <--RelatedTo--> Coverage --IsA--> Extent <--RelatedTo--> Limit <--RelatedTo--> Fast 