query GetAllCountries {
  countries {
    id
    name
  }
}
query GetYearData {
  data(year: $years, country_id: $country_ids){
    ...DatumFragment
  }
}
query GetCountryData($id: Integer!) {
  countries(id: $id){
    data {
      ...DatumFragment
    }
  }
}

fragment DatumFragment on Datum {
  year
  population
  gdp
  total_emissions
  energy_emissions
  industrial_emissions
  agriculture_emissions
  waste_emissions
  lucf_emissions 
}