query: select ?country (group_concat(?NatureLabelFr;separator=" ,") as ?NatureLabel) ?countryLabel  ?creationDate ?dissolutionDate
  with {
  select ?country (coalesce(?countryLabelFr, ?countryLabelEn,  ?country) as ?countryLabel) ?creationDate ?dissolutionDate{
  ?country wdt:P31/wdt:P279* wd:Q3624078 # sovereign states, I don’t know if it’s the right item
  MINUS { ?country (wdt:P31/wdt:P279*) wd:Q1790360. }#empires coloniaux
  MINUS { ?country (wdt:P31/wdt:P279*) wd:Q1371288. } #états vassals
  optional { ?country rdfs:label ?countryLabelFr filter(lang(?countryLabelFr)= "fr")} .
  optional { ?country rdfs:label ?countryLabelEn filter(lang(?countryLabelEn)= "en")}
  optional { ?country wdt:P571 ?creationDate }
  optional { ?country wdt:P576 ?dissolutionDate }
  } order by ?countryLabel
  } as <da>tas
  where {
  include <da>tas .
  optional{
  ?country wdt:P31/rdfs:label ?NatureLabelFr filter(lang(?NatureLabelFr)= "fr") .
  }
  } group by ?country ?countryLabel  ?creationDate ?dissolutionDate