Lack is a different concept from Availability. Availability is a synonym of Opening. Opening is a type of Ceremony. Ceremony is related to Money. 
Awareness is a synonym of Knowledge. you are likely to find Knowledge in/at/on Book. 
Lack <--DistinctFrom--> Availability <--Synonym--> Opening --IsA--> Ceremony <--RelatedTo--> Money 
Awareness <--Synonym--> Knowledge --AtLocation--> Book 