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 news came as the death toll from last Sunday's explosion at the Dongfeng coal mine near Qitaihe in the northeastern Heilongjiang province rose to 169. China's mines, many of them illegal, are considered the most dangerous in the world, especially in recent years, with demand for raw materials escalating to help fuel China's rapid economic growth.

are