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: Moscow ( CNN ) Ever since Vladimir Putin came to power , there have been killings of politicians , of human rights activists , of journalists . 2: But few who took part could have missed the symbolism , the real message the killers -- whoever they are -- sent by gunning down such a prominent Kremlin critic in the shadow of its towering walls . 3: A series of Kremlin critics have been murdered since Vladimir Putin came to power .

1: politicians , of human rights activists , of journalists 2: prominent Kremlin critic 3: A series of Kremlin critics