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*
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Question: 1: But as with any potential threat to human health , they are preparing for the worst just in case . 2:  The risk to humans is low , our food supply is safe ,  said Dr . John Clifford , the USDA 's Chief Veterinary Officer . 3: The CDC says  the risk to humans is low ,  but , as always , they are preparing for the worst case .

Answer: 1: they 2: USDA 3: The CDC


Question: 1: What 's different this time from 1934 is the size and density of Kathmandu , which suffered the brunt of damage in both earthquakes . 2:  When you get a vast population in the kind of building infrastructure that is n't equipped to handle shaking of an earthquake this size , that 's when you see the scale of disaster we 're seeing now .  3: Population density , weak building infrastructure amplified damage , USGS spokesman says .

Answer: 1: earthquakes 2: disaster we 're seeing now 3: damage


Question: 1: ( CNN ) Two more American aid workers who had high-risk exposure to Ebola in Sierra Leone arrived back in the United States on Monday for monitoring . 2: Eight of their colleagues have already been flown back to the United States , where health authorities are watching them closely for signs of the disease , according to the Centers for Disease Control and Prevention . 3: Eight aid workers have already returned , and two more are back Monday .

Answer:
1: Two more American aid workers who had high-risk exposure to Ebola in Sierra Leone 2: their 3: two more