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: 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 .

SOLUTION: 1: Kremlin 2: the Russian government 3: Russian government

PROBLEM: 1: Islamabad , Pakistan ( CNN ) Police have arrested more than 500 parents in and around the northwestern Pakistani city of Peshawar for not allowing their children to get the polio vaccine , an official said Tuesday . 2: Those arrested will be released on bail if they sign an affidavit stating that they will let their children get vaccinated , according to the deputy commissioner . 3: Official : Parents who sign affidavit vowing to vaccinate their children will be released .

SOLUTION: 1: more than 500 parents in and around the northwestern Pakistani city of Peshawar 2: Those arrested 3: Parents

PROBLEM: 1: The Grand Renaissance Dam is being built on Blue Nile , a tributary of the Nile River which has been powering the agriculture of Sudan and Egypt -- through which it flows -- for millennia . 2: These countries have opposed the project in the past , fearing that the dam will reduce their share of the Nile water . 3: Neighboring Sudan and Egypt fear that the dam will affect their water supply .

SOLUTION:
1: The Grand Renaissance Dam 2: the project 3: the dam