Secret is related to Hide. Terrorism would make you want to Hide. 
Liquid is related to Cry. People would make you want to Cry. Migration is a type of People. Immigration is a type of Migration. 
Secret <--RelatedTo--> Hide <--CausesDesire-- Terrorism 
Liquid <--RelatedTo--> Cry <--CausesDesire-- People <--IsA-- Migration <--IsA-- Immigration 