> For the complete documentation index, see [llms.txt](https://870167019.gitbook.io/blockchainspider/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://870167019.gitbook.io/blockchainspider/guides/collect-label-data.md).

# Collect label data

## The OFAC

The U.S. Department of the Treasury was established in 1789. Handle the financial affairs of the United States Federation, whose Office of Foreign Assets Control (OFAC) publishes a Specially Designated Nationals (SDN) list containing information of several entities in the blockchain.

In this section, we will demonstrate how to collect labeled addresses in the OFAC sanctions list!

## Start a crawl task

Run this command as follow:

```
scrapy crawl labels.ofac
```

You can find the label data on `./data/labels.ofac`, each row of this file is a JSON object just like this:

```json
{
    "net":"ETH",
    "label":"Entity",
    "info":{
        "uid":"30518",
        "address":"0x72a5843cc08275C8171E582972Aa4fDa8C397B2A",
        "first_name":null,
        "last_name":"SECONDEYE SOLUTION",
        "identities":[
            {
                "id_type":"Email Address",
                "id_number":"support@secondeyesolution.com"
            },
            {
                "id_type":"Email Address",
                "id_number":"info@forwarderz.com"
            }, ...
        ]
    }
}
```

**Note**: Please indicate the source when using crawling labels.


---

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Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
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```

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