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: It was on this short journey , in the heart of Moscow , that the gunman struck , leaving Nemtsov dead within sight of the red Kremlin walls -- walls which , by the way , bristle with security cameras . 2: And while the hope among opposition activists is that Nemtsov 's killing may at least invigorate their ranks , one very real possibility is that it will do the exact opposite : further silence an already very quiet minority opposed to the rule of Vladimir Putin . 3: The killing of Boris Nemtsov has struck fear into the hearts of Putin 's critics .

1: Nemtsov 2: Nemtsov 3: Boris Nemtsov