Determining where resources came from?

I've tried using item.parent, item.info.Parent, to try and get the parent's shortname that way, and they're always null. Is there a way to accomplish this?

Code:

void CanAcceptItem(ItemContainer container, Item item)
        {
            BasePlayer itemOwner = container?.GetOwnerPlayer();
            if (itemOwner != null && item?.info?.shortname == "charcoal")
            {
// How to determine if the charcoal came from a Furnace, Large Furnace, or Campfire?
            }
        }