Credit is a type of Accomplishment. Accomplishment is related to Reward. Reward is related to Interest. Interest is related to Incentive. 
you are likely to find Landmark in/at/on Map. you are likely to find Map in/at/on Classroom. you are likely to find Wall in/at/on Classroom. 
Credit --IsA--> Accomplishment <--RelatedTo--> Reward <--RelatedTo--> Interest <--RelatedTo--> Incentive 
Landmark --AtLocation--> Map --AtLocation--> Classroom <--AtLocation-- Wall 