Trading ex dividend today: APN Outdoor, Adacel Technologies, Blackmores, Caltex Australia, Canterbury Surrey Hills, Cardno, MMA Offshore, Oil Search, Phileo Australia, Ramsay Health Care, Saunders International, Service Stream, SpeedCast International.
What is the relationship between 'Caltex' and 'Oil' in the context of the input sentence.
Options: employer, product/material produced, owner of, position held