query: SELECT ?entity ?entityLabel ?entityDescription 
  WHERE
  {
    ?entity 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 { ?entity wdt:P3450 []; 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))  } 
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en" }
  }
  LIMIT 1000