Wed, Jul 15, 2015, 11:40 BST - UK Markets close in 4 hrs 50 mins When Will It Be Time To Buy Explorers Gulf Keystone Petroleum Limited, Enquest Plc And Tullow Oil plc?
What is the relationship between 'Tullow Oil' and 'Petroleum' in the context of the input sentence.
Options: owner of, creator, member of, product/material produced