The output for an item currently contains only schema:dateModified (https://schema.org/dateModified). For example a recently created almost empty item.

SELECT ?property ?value WHERE {
  wd:Q27895261 ?property ?value
}

Gives

property value
schema:version 409884566
schema:dateModified Nov 21, 2016
rdfs:label Washington (sigarenmerk)

Would be nice to also have the creation date of each item (and probably property too) as schema:dateCreated (https://schema.org/dateCreated). That way it's easier to make statistics.