Rule is a type of Decide. you are likely to find Rule in/at/on School. School is related to Graduate. Graduate is related to Leave. 
Event is related to Work. Work is a synonym of Part. End is a type of Part. End is a type of Contribution. 
Decide <--IsA-- Rule --AtLocation--> School <--RelatedTo--> Graduate <--RelatedTo--> Leave 
Event <--RelatedTo--> Work <--Synonym--> Part <--IsA-- End --IsA--> Contribution 