West is related to Pioneer. Pioneer is a type of Introduce. Introduce is related to Bring. Bring is related to Gather. 
Diplomatic is related to Ambassador. Ambassador is related to International. International is a synonym of External. 
West <--RelatedTo--> Pioneer --IsA--> Introduce <--RelatedTo--> Bring <--RelatedTo--> Gather 
Diplomatic <--RelatedTo--> Ambassador <--RelatedTo--> International <--Synonym--> External 