you are likely to find Reader in/at/on Library. Library is a type of Place. Place is related to Point. Deadline is a type of Point. 
Last is a type of Measure. Measure is related to Population. 
Reader --AtLocation--> Library --IsA--> Place <--RelatedTo--> Point <--IsA-- Deadline 
Last --IsA--> Measure <--RelatedTo--> Population 