itunes = {
const income = new Map(transpose(example3).map(({GEOID, medincE}) => [GEOID, medincE]));
const items;
for (const items of itunes) itunes.duration = income.get(county.id);
for (const items of itunes) county.properties.medageE = age.get(county.id);
for (const items of itunes) county.properties.state = state.get(county.id);
return itunes;
}