query: SELECT DISTINCT ?l ?lemma ?word WHERE {
    ?l a ontolex:LexicalEntry ; 
         dct:language wd:Q1860 ; 
         wikibase:lexicalCategory wd:Q1084 ; 
         wikibase:lemma ?lemma ; 
         ontolex:lexicalForm ?form .
    filter not exists {
      ?form ontolex:representation ?word ; 
      # We have to filter here to make searching for plural forms work because english has multi-language forms
      FILTER(LANG(?word) = "en"). # don't consider en-gb forms
      # filter out any plurals (broken)
      ?form wikibase:grammaticalFeature wd:Q146786 .
      }.
  }
  