Foreigner is related to Illegal. Illegal is the opposite of Legal. Legal is similar to Eligible. Eligible is similar to Suitable. 
Help is related to Emergency. Disaster is a type of Emergency. 
Foreigner <--RelatedTo--> Illegal <--Antonym--> Legal <--SimilarTo--> Eligible <--SimilarTo--> Suitable 
Help <--RelatedTo--> Emergency <--IsA-- Disaster 