Definition: 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*
Input: 1: South Korea is working on a response to the demands , leaving factory owners worried about the threat of a factory shutdown . 2: North Korea is demanding an increase of roughly 5.5 % , to an equivalent $ 164.10 a month . 3: North Korea demanded a pay increase ; South Korea 's working on a response .

1: the demands 2: an increase 3: a pay increase