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: Moreover , the surge of right-wing extremism that marked the 1990s had seemingly ebbed . 2: What the tragedies of 1995 and 2001 together teach is that the United States faces threats from multiple sources of extremism , all of which must be taken seriously . 3: Deborah Lauter and Mark Pitcavage : Right-wing extremism should still be taken seriously .

1: right-wing extremism 2: threats from multiple sources of extremism 3: Right-wing extremism