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.
Analyze the relationship between 'Caltex' and 'Oil' within the context of the input sentence.
Options: owner of, product/material produced, position held, employer