Obligation is related to Due. Due is related to Library. Library is related to Place. 
Burn is a type of Injury. Injury is related to Broken. Broken is a type of Album. Documentary is a type of Album. 
Obligation <--RelatedTo--> Due <--RelatedTo--> Library <--RelatedTo--> Place 
Burn --IsA--> Injury <--RelatedTo--> Broken --IsA--> Album <--IsA-- Documentary 