Call is a type of Order. Order is a synonym of Tribe. Tribe is related to Group. Group is related to Public. 
Organize is a type of Initiate. Initiate is a synonym of Pioneer. Pioneer is a type of Introduce. Introduce is related to Presentation. 
Call --IsA--> Order <--Synonym--> Tribe <--RelatedTo--> Group <--RelatedTo--> Public 
Organize --IsA--> Initiate <--Synonym--> Pioneer --IsA--> Introduce <--RelatedTo--> Presentation 