Letter is related to Size. Size is related to Measure. Measure is related to Determination. 
Shareholder is a type of Investor. you are likely to find Shareholder in/at/on Company. Company is related to Factory. you are likely to find Steel in/at/on Factory. 
Letter <--RelatedTo--> Size <--RelatedTo--> Measure <--RelatedTo--> Determination 
Investor <--IsA-- Shareholder --AtLocation--> Company <--RelatedTo--> Factory <--AtLocation-- Steel 