<http://schema.org/mainEntityOfPage>
<http://archives.sfexaminer.com/sanfrancisco/chevron-refinery-limps-along-without-key-unit/Content?oid=2202315>
<http://archives.sfexaminer.com/sanfrancisco/chevron-refinery-limps-along-without-key-unit/Content?oid=2202315>