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: Industry analysts estimate the bureau has about 200,000 tons of copper stockpiles, the exact figure is treated as a State secret in China. The soaring copper prices, which has increased profit margin in the copper smelting industry, has led the government to fear the making of an investment bubble, prompting the NDRC to announce last month that the government will soon introduce a slew of measures to rein in the investment in the copper smelting industry.

announce