you are likely to find Period in/at/on School. School is related to Fail. Fail is a synonym of Decline. 
Legal is related to Just. Just is a synonym of Suitable. Suitable is similar to Eligible. 
Period --AtLocation--> School <--RelatedTo--> Fail <--Synonym--> Decline 
Legal <--RelatedTo--> Just <--Synonym--> Suitable <--SimilarTo--> Eligible 