Event components:
Event mention - occurrence of an event of a particular type, includes event trigger and event argument. Usually description of an event by some phrases or sentences.
Even trigger - entity that most clearly describes an event. (usually verb)
Event argument - some entities that can be found in event mention. Usually set as participant or attribute (Time, Org, Place, Person), entity mention, temporal expression, value.
Argument role - relation between event trigger and event argument
Given Russian text, an event extraction system should predict event triggers with specific subtypes and their arguments for each sentence