<http://www.bigdogsrule.net/summer/general-info/pre-season-camp/>
<http://schema.org/description>
"季前探险营分为两期，为期一周 prior to the start of the full camp season."
<http://www.bigdogsrule.net/student-life/renbrook-school-summer-adventure/general-info/pre-season-camp>