Cluster is a type of Meet. Call can cause/lead to Meet. Call is related to Quiet. one thing you do when you Think is Quiet. 
Christian is related to Minister. Minister is related to Pastor. Pastor is related to Priest. 
Cluster --IsA--> Meet <--Causes-- Call <--RelatedTo--> Quiet <--HasSubevent-- Think 
Christian <--RelatedTo--> Minister <--RelatedTo--> Pastor <--RelatedTo--> Priest 