<http://schema.org/mainEntityOfPage>
<http://archives.sfexaminer.com/sanfrancisco/sfo-advertising-contract-stalls-amid-concerns-over-provisions-bidding-process/Content?oid=2320699>
<http://archives.sfexaminer.com/sanfrancisco/sfo-advertising-contract-stalls-amid-concerns-over-provisions-bidding-process/Content?oid=2320699>