[history_messages]

Existing Rationale:
[rationale_list]

Based on the most recent response, determine whether there is information that can be used as a new rationale to answer the question. Do not add repeatedly.
If so, the output is in the following format:
```json
{
    "rationale": "summarize info that can be used as a new rationale", 
    "related_area": "area_name",
}
```
Or output in the following format:
```json
{
    "rationale": "summarize info that can be used as a new rationale", 
    "related_area": "area_name",
    "related_obj": "object_name"
}
```
If not, output the following:
```json
{
    "no_rationale": true
}
```
