Request is related to Offer. Offer is a type of Threaten. Threaten is a type of Warn. Alarm is a type of Warn. 
Shark wants (to) Eat. you are likely to find Shark in/at/on News. News is related to Network. 
Request <--RelatedTo--> Offer --IsA--> Threaten --IsA--> Warn <--IsA-- Alarm 
Eat <--Desires-- Shark --AtLocation--> News <--RelatedTo--> Network 