TASK 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*
PROBLEM: 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 .

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

PROBLEM: 1: ( CNN ) A sixth suspect in the shooting death of a top Russian opposition figure blew himself up after a standoff with police in the capital of the Chechen Republic , state-run television reported Sunday . 2: Police surrounded the building and Shavano tried to escape , throwing a grenade at police officers before blowing himself up , the station said . 3: With police surrounding hiding place , sixth suspect kills himself , Russian media say .

SOLUTION: 1: A sixth suspect in the shooting death of a top Russian opposition figure 2: Shavano 3: sixth suspect

PROBLEM: 1: Massachusetts is hosting two of the highest-profile court trials in recent memory -- those of former New England Patriot Aaron Hernandez and Boston bombing suspect Dzhokhar Tsarnaev . 2: Both lengthy trials are coming to a close . 3: The trials of Dzhokhar Tsarnaev and Aaron Hernandez are coming to a close .

SOLUTION:
1: two of the highest-profile court trials in recent memory -- those of former New England Patriot Aaron Hernandez and Boston bombing suspect Dzhokhar Tsarnaev 2: Both lengthy trials 3: The trials of Dzhokhar Tsarnaev and Aaron Hernandez