Fuel is related to Corn. Corn is related to Good. Good is related to Style. Style is a type of Write. 
Person can be used for Labor. Person is related to Customer. Customer is the opposite of Employee. Employee is the opposite of Employer. 
Fuel <--RelatedTo--> Corn <--RelatedTo--> Good <--RelatedTo--> Style --IsA--> Write 
Labor <--UsedFor-- Person <--RelatedTo--> Customer <--Antonym--> Employee <--Antonym--> Employer 