Legal is related to Trial. you are likely to find Trial in/at/on Courtroom. Courtroom is related to Lawyer. 
you are likely to find Sand in/at/on Concrete. Sand is related to Glass. Glass is related to Telescope. Telescope is related to Astronomer. 
Legal <--RelatedTo--> Trial --AtLocation--> Courtroom <--RelatedTo--> Lawyer 
Concrete <--AtLocation-- Sand <--RelatedTo--> Glass <--RelatedTo--> Telescope <--RelatedTo--> Astronomer 