This event has the “event_start” label attribute which is defined in the widget as the tag marking events to be fetched.
This event has the “event_type” label of value “forcedInto”, sorting it into the corresponding group with id “forcedInto” defined in “event_type_list” attribute on the widget, but then the event is forced into the group “third” as defined. The group “forcedInto” never appears on the timeline or as a button, it is a way of sorting events separately (with a different type tag and potentially different colors or other settings) within the same visual group.