> ## Documentation Index
> Fetch the complete documentation index at: https://api.globalwebindex.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Step 4: Ask a follow up question

The Spark API allows you to maintain context across multiple queries by including a
Chat History ID in your request. This feature is particularly useful when you're
iterating on a query or refining insights based on previous interactions.

Why Use Chat History?

* **Seamless Conversations**: Ensures continuity by linking your current query with previous ones.
* **Refinement**: Allows the system to provide more relevant and contextualized insights based on the prior questions and responses.
* **Efficiency**: Avoids the need to restate context in each new query.

Lets use the chat ID to ask how eco-conscious millennials social media usage differs
from that of eco conscious boomers

<RequestExample>
  ```bash theme={null}
  curl -X POST --location "https://api.globalwebindex.com/v1/spark-api/generic" \
      -H "Content-Type: application/json" \
      -H "Authorization: Bearer YOUR_API_KEY" \
      -d '{
            "prompt" : "How does social media usage differ between boomers and eco-conscious millennials?",
            "chat_id": "bad0ca6c-5e53-44ad-960d-1f5e7f294d2a"
          }'
  ```
</RequestExample>

<ResponseExample>
  ```json Response theme={null}
  {
    "message": "Based on your input, here are some interesting Insights:",
    "insights": [
      "11% of environmentally conscious individuals use Pinterest daily, which is more than double the rate of Baby Boomers at 5.2%.",
      "Baby Boomers are 423% more likely to visit or use Nextdoor more than once a day compared to environmentally conscious individuals.",
      "52% of environmentally conscious individuals use Instagram more than once a day, compared to only 13% of Baby Boomers.",
      "Environmentally conscious individuals are 167% more likely to visit Quora daily compared to Baby Boomers.",
      "45% of Baby Boomers use Facebook more than once a day, slightly higher than the 42% of environmentally conscious individuals who do the same."
    ],
    "chat_id": "bad0ca6c-5e53-44ad-960d-1f5e7f294d2a",
    "sources": {
      "topics": [
        "social media platforms"
      ],
      "audiences": [
        {
          "id": "3f552047-abdd-4c1a-ad96-4f1b52ea2fe0",
          "name": "Attitudes: Eco Activists ",
          "description": "This audience consists of individuals who prioritize helping the environment, are willing to pay more for eco-friendly products, and have an interest in environmental issues."
        }
      ],
      "datasets": [
        {
          "code": "ds-core",
          "name": "GWI Core"
        }
      ],
      "locations": [
        {
          "code": "s2_44",
          "name": "UK"
        }
      ],
      "waves": [
        {
          "code": "q1_2024",
          "name": "Q1 2024"
        },
        {
          "code": "q2_2024",
          "name": "Q2 2024"
        },
        {
          "code": "q3_2024",
          "name": "Q3 2024"
        },
        {
          "code": "q4_2024",
          "name": "Q4 2024"
        }
      ]
    }
  }
  ```
</ResponseExample>