You will be given three sentences. Read them, then identify a noun phrase (person, place, or thing) or event that is shared between all three sentences. As the output, write the span of the text corresponding to that phrase in each sentence. Keep the order of the sentences, that is, your answer should look like: 1: *a phras from sentence 1e* 2: *a phras from sentence 2* 3: *a phrase from sentence 3*

1: Codes used in the attack were said to be similar in pattern to those used by the North Koreans , South Korean authorities said . 2: A report by the Korea Institute for Industrial Economics and Trade , a government-funded think tank , estimates that Dark Seoul caused about $ 820 million worth of damage . 3: December attack on banks in South Korea caused about $ 820 million worth of damage , a report says .
1: the attack 2: Dark Seoul 3: December attack on banks in South Korea