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: Attacks against AU troops and aid workers in Darfur are now part of the shaky security in the region. Last week, The AU slammed an attack by unidentified group against an AU monitor team near the Chadian border, in which the attackers seized a vehicle and communication radio.

are