one thing you do when you Writing is Begin. Begin is a synonym of Get. Isolate is a type of Get. Isolated is a form of Isolate. 
Random is related to Occasion. Occasion is a type of Cause. Cause is related to Initial. Initial is related to Turn. 
Writing --HasSubevent--> Begin <--Synonym--> Get <--IsA-- Isolate <--FormOf-- Isolated 
Random <--RelatedTo--> Occasion --IsA--> Cause <--RelatedTo--> Initial <--RelatedTo--> Turn 