{featureGroup.title} select
{feature.value}
{category.title}
Option A
{"group": "{item.featureGroup.uid}", "value": "{item.uid}"}{f:if(condition: '!{iterator.isLast}', then: ', ')} , {"group": "category", "value": "{item.uid}"}{f:if(condition: '!{iterator.isLast}', then: ', ')}