<https://ongreenport.com/event/festival-36th-fall-festival-clam-chowder-contest-on-the-green-3/#event>
<http://schema.org/eventAttendanceMode>
"https://schema.org/OfflineEventAttendanceMode"
<https://ongreenport.com/event/festival-36th-fall-festival-clam-chowder-contest-on-the-green-3/>