query: SELECT ?item ?itemLabel
  WHERE {
    ?item wdt:P641 ?sport ;
          wdt:P31 ?competition.
    FILTER (?sport IN (wd:Q1682809, wd:Q926191, wd:Q4179462, wd:Q4305887, wd:Q1482312, wd:Q38108))
    FILTER (?competition IN (wd:Q57305027, wd:Q2990963))
    MINUS { ?item wdt:P580 ?date .}
    MINUS {
      ?item p:P585/psv:P585 ?date_node.
      ?date_node wikibase:timePrecision "11"^^xsd:integer .
    }
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
    }