Valley is a type of Stadium. Stadium is related to Band. Glove is a type of Band. 
Possible is related to Could. Could is etymologically related to Shall. Shall is similar to Will. 
Valley --IsA--> Stadium <--RelatedTo--> Band <--IsA-- Glove 
Possible <--RelatedTo--> Could --EtymologicallyRelatedTo--> Shall <--SimilarTo--> Will 