In admin to display the values from the filter?

The thing I have a model of the participants and tied to her mojel of the event for which the participant subscribed. In the admin you should print the participant's name, last name, event and date of registration. There is in the admin list_filter for activities for kotoyre subscribed members. Please tell me how to display is the event that I choose in the filter?
June 14th 19 at 20:00

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