Emerge is a synonym of Issue. Abortion is a type of Issue. 
you are likely to find Silver in/at/on House. House is related to Church. Church is a type of Religion. Religion is related to Preference. 
Emerge <--Synonym--> Issue <--IsA-- Abortion 
Silver --AtLocation--> House <--RelatedTo--> Church --IsA--> Religion <--RelatedTo--> Preference 