Agricultural is related to Farmer. Farmer is related to Corn. 
Busy is related to Working. Working is related to Office. you are likely to find Door in/at/on Office. you are likely to find Door in/at/on School. 
Agricultural <--RelatedTo--> Farmer <--RelatedTo--> Corn 
Busy <--RelatedTo--> Working <--RelatedTo--> Office <--AtLocation-- Door --AtLocation--> School 