Introduce is related to Make. Make is related to Blow. Knock is a type of Blow. Knock is a type of Sound. 
Broad is related to Stroke. Stroke is a synonym of Shot. 
Introduce <--RelatedTo--> Make <--RelatedTo--> Blow <--IsA-- Knock --IsA--> Sound 
Broad <--RelatedTo--> Stroke <--Synonym--> Shot 