Describe is related to Do. Do is related to Requirement. 
Ceo is derived from Executive. Ceo is related to Headquarters. Headquarters is related to Capital. Stock is a type of Capital. 
Describe <--RelatedTo--> Do <--RelatedTo--> Requirement 
Executive <--DerivedFrom-- Ceo <--RelatedTo--> Headquarters <--RelatedTo--> Capital <--IsA-- Stock 