Say I have two metrics in prometheus, both counters:

* `requests_processed_total`
* `requests_failed_total`

They both have a matching `service` label. Example:

```
requests_processed_total{service="news"} 1097
requests_processed_total{service="store"} 487
requests_failed_total{service="news"} 23
requests_failed_total{service="store"} 89

```

How to query the `requests_failed_total`, but only for services whose `request_processed_total > 1000`.

I'm expecting the following response:

```
requests_failed_total{service="news"} 23

# Note that the "store" service is excluded

```