Automation: trigger only when attribute doesn't contain value

Configuration
1

I’m using the MeteoAlarm integration. I’ve configured it for my country (NL) and my province (Groningen), and combined it with an automation to message me when it fires:

- id: alert_weather_alarm
  trigger:
    platform: state
    entity_id: binary_sensor.meteoalarm
    from: 'off'
  action:
  - service: notify.telegram
    data:
      message: "Weather alarm: {{state_attr('binary_sensor.meteoalarm', 'headline')}}. Message: {{state_attr('binary_sensor.meteoalarm', 'description')}} is effective on {{state_attr('binary_sensor.meteoalarm', 'effective')}}"

It works, however, I also get messages that are not meant for my province. The are formatted like this:

Weather alarm: Snow-ice - No warnings for Groningen - The Netherlands. Message: Risk of locally icy patches due to condensation.
BE AWARE of widespread snow and/or ice on roads and pavements.
Localized disruption of outdoor activities.
 Take care when walking, cycling or driving due to slippery surfaces. is effective on 2020-11-29T22:43:42+00:00

So I’d like to extend the automation (or use another binary sensor) to only trigger when the headline doesn’t contain ‘No warnings for Groningen’. However, I have no clue as to how.

Any idea?

2

Use a Template condition

{{ 'No warnings for Groningen' not in state_attr('binary_sensor.meteoalarm', 'headline') }}
3

Perfect, solved and learned something new. Thank you!