query: SELECT DISTINCT ?item where {
   ?item wdt:P31 wd:Q5 .
  OPTIONAL { ?item wdt:P21 ?gender } .
   FILTER ( !BOUND (?gender ) ) .
   BIND (xsd:integer(STRAFTER(str(?item), "Q")) AS ?qid)
   FILTER ( ?qid > 47250000 ). # jan-2017?
  } LIMIT 7500