they are defined at Concept but I suggest to move them to Item to mirror startDate, endDate. This would match your 0.2.0 (2017-09-21) change: "Move startDate, endDate, relatedDate, and location from Concept to Item"
they are missing from the context.
perhaps because there are no appropriate schema props, see #97
Issues about startPlace, endPlace:
Concept
but I suggest to move them toItem
to mirror startDate, endDate. This would match your 0.2.0 (2017-09-21) change: "Move startDate, endDate, relatedDate, and location from Concept to Item"