Definition: In this task, a passage will be given and the goal is to identify an event from the passage. An event is defined as a single word representing something that happened, is happening, or may happen. An event can be factual or hypothetical, positive or negative, certain or uncertain. While most events are based on verbs, an event can also be based on a noun (ex. storm, snow, rainfall) or a copula verb (is, was, been, etc.). The event must not be a pronoun or an adjective. For noun events with multiple words, use the last word in the phrase as event.
Input: Passage: The summoning of politicians came after prosecutors pledged a new probe into politicians whose names have surfaced in the course investigations into the massive loans-for-kickbacks scandal engulfing Hanbo. The prosecution had said that aside from the arrested four, they had no plans to investigate other politicians who allegedly took customary "rice cake expenditures."

summoning