Crowd is related to Marketplace. Marketplace is derived from Market. Market is related to Purchase. 
the first thing you do when you Pray is Kneel. Christian can Pray. Christian is related to God. 
Crowd <--RelatedTo--> Marketplace --DerivedFrom--> Market <--RelatedTo--> Purchase 
Kneel <--HasFirstSubevent-- Pray <--CapableOf-- Christian <--RelatedTo--> God 