Corporation is related to Legal. Legal is similar to Eligible. 
Stem is related to Leaf. Leaf is related to Element. Element is a type of Situation. Validity is a type of Situation. 
Corporation <--RelatedTo--> Legal <--SimilarTo--> Eligible 
Stem <--RelatedTo--> Leaf <--RelatedTo--> Element --IsA--> Situation <--IsA-- Validity 