Using the autolist 2 tool (http://tools.wmflabs.org/autolist/index.php), I enter the WDQ query: CLAIM[486:"D008180"]
which I think means "Give me the items that have MeSH id = "D008180" ". It does indeed return an item with that claim Q1495661
but also returns items that have an *no value* as the object of that relationship, such as http://www.wikidata.org/wiki/Q3377653 http://www.wikidata.org/wiki/Q7796109 http://www.wikidata.org/wiki/Q1598365
Is this a bug in the query API or a bug in my query ?
thanks! -Ben