Pleasure is etymologically related to Please. Killing can cause/lead to Pleasure. Killing can cause/lead to Freedom. Knowledge is a type of Freedom. 
Oil is related to Bush. Bush is a type of President. President is related to Minister. 
Please <--EtymologicallyRelatedTo-- Pleasure <--Causes-- Killing --Causes--> Freedom <--IsA-- Knowledge 
Oil <--RelatedTo--> Bush --IsA--> President <--RelatedTo--> Minister 