Post is related to Army. Army is related to Duty. Duty is similar to Accountability. 
you are likely to find Clue in/at/on Drawer. you are likely to find Video in/at/on Drawer. 
Post <--RelatedTo--> Army <--RelatedTo--> Duty <--SimilarTo--> Accountability 
Clue --AtLocation--> Drawer <--AtLocation-- Video 