Bulk is a synonym of Volume. you are likely to find Volume in/at/on Library. Library is related to Center. 
Split is related to Cream. Cream is related to Shake. Shake is a synonym of Weaken. Weaken is a synonym of Undermine. 
Bulk <--Synonym--> Volume --AtLocation--> Library <--RelatedTo--> Center 
Split <--RelatedTo--> Cream <--RelatedTo--> Shake <--Synonym--> Weaken <--Synonym--> Undermine 