{
    "subjects": [
        "one",
        "two"
    ],
    "iterations": [
        10,
        20,
        10,
        30
    ]
}
---
{
    "partition": ["subject_name"],
    "components": [
        {
             "component": "table_aggregate",
             "row": {
                 "greeting": "first(partition[\"subject_name\"])"
             }
        }
    ]
}
---
+----------+
| greeting |
+----------+
| one      |
+----------+

+----------+
| greeting |
+----------+
| two      |
+----------+

