Prescott quietly slipped out of Aurizon last week, and the public formalities of Monday's obviously solid annual results announcement provided a timely platform for chief executive Lance Hockridge to reassert a recovery of focus on his core coal business and on sating senior owners' expectations that he is running an annuity investment.
Utilize the input text as a context reference, choose the right relationship between 'Aurizon' and 'coal' from the options.
Options: manufacturer, product/material produced, employer, operator