The task is to generate text based of an event. For the given event, there will be a person who does the action in the event (usually PersonX). Your task is to write that persons emotional reaction to the event, i.e. how that person feels after doing the action.

PersonX establishes PersonY identity
responsible
As the event describes that PersonX has established PersonY's identity, it can be inferred that this was a challenging task. Therefore, the action was likely to make PersonX feel responsible for their achievement..