. _:b17347820 . _:b17347821 _:b17347822 . _:b17347820 . _:b17347825 . _:b17347822 . _:b17347823 _:b17347824 . . _:b17347824 . _:b17347825 . "start date" . _:b17347821 . "The start date and time of the item (in ISO 8601 date format)." . _:b17347822 _:b17347823 . _:b17347823 . _:b17347824 _:b17347825 . _:b17347820 _:b17347821 .