Headache is related to Pain. Pain is related to Rain. 
one thing you do when you Lie is Injury. the last thing you do when you Lie is Worry. Worry is a synonym of Concern. Concern is a synonym of Occupy. 
Headache <--RelatedTo--> Pain <--RelatedTo--> Rain 
Injury <--HasSubevent-- Lie --HasLastSubevent--> Worry <--Synonym--> Concern <--Synonym--> Occupy 