<http://schema.org/mainEntityOfPage>
<http://archives.sfexaminer.com/sanfrancisco/historian-talks-about-1989-quakes-effect-on-the-city/Content?oid=2141637>
<http://archives.sfexaminer.com/sanfrancisco/historian-talks-about-1989-quakes-effect-on-the-city/Content?oid=2141637>