Obligation is related to Must. Must is related to Duty. 
Standing is related to Stage. Stage is a type of Facility. Facility is related to Farm. you are likely to find Mouse in/at/on Farm. 
Obligation <--RelatedTo--> Must <--RelatedTo--> Duty 
Standing <--RelatedTo--> Stage --IsA--> Facility <--RelatedTo--> Farm <--AtLocation-- Mouse 