Adding SDC depicts statements requires a good coverage of the monuments of Wikidata. Some of the work with importing the Monuments database has been done by both the community and WMSE. There is a table that summarizes the different countries, but it's probably not up to date.

• Go through the countries and check the status -- how many of the monuments exist on Wikidata?
• Identify countries for import (preferably with external identifiers, countries with a lot of entries in Monuments database but not a lot on Wikidata, see how much we mapped previously)