Silence is related to Complete. Complete is related to Whole. Assembly is a type of Whole. Assembly is related to Party. 
Substantial is a synonym of Real. Real is similar to Historical. 
Silence <--RelatedTo--> Complete <--RelatedTo--> Whole <--IsA-- Assembly <--RelatedTo--> Party 
Substantial <--Synonym--> Real <--SimilarTo--> Historical 