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: Although Kremlin involvement in her killing was never proved , the number of brave , outspoken investigative journalists in Russia dropped to only a handful after her death . 2: These sanctions will also act as a real consequence if the Russian government refuses to cooperate with an independent inquiry into Nemtsov 's murder . 3: Russian government has denied any involvement in killing .

1: her killing 2: Nemtsov 's murder 3: killing