Please let me know If I am doing anything wrong!
TODO
Memo
Embedded Wikidata query
Harvesting infoboxes to add P31 (instance of)
Let's say all articles on the Polish Wikipedia with template "Meteoryt infobox" are about a meteorite. Many of them do not have any P31. Let's fix that:
Open https://tools.wmflabs.org/pltools/harvesttemplates/ and set Wiki=pl.wikipedia.org, Property=P31, Template=Meteoryt infobox, Parameter=0
Press on "get values" then "demo". Do NOT press on "add values"!
Wait for the demo to finish (this step retrieves the QIDs)
Press "TSV" to download the data in Gnumeric
Keep only the second column "qid"
Add a second column with header "P31" and "Q9252191" (replace with the QID of the class you want these items to be an instance of) on all rows
Copy the data into Geany, replace all tabs with a comma
Open https://tools.wmflabs.org/quickstatements and import as CSV
Run