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*

Q: 1: Researchers say Mars may once have had an sea as extensive as Earth 's Atlantic Ocean , and Curiosity has found evidence of ancient streambeds and a lake on the planet . 2:  Conditions near the surface of present-day Mars are hardly favorable for microbial life as we know it ,  he said ,  but the possibility for liquid brines on Mars has wider implications for habitability and geological water-related processes .  3: The finding has  wider implications  for efforts to find evidence of life on Mars , a researcher says .

A: 1: Mars 2: Mars 3: Mars
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Q: 1: It may help scientists better understand why Yellowstone 's previous eruptions , in prehistoric times , were some of Earth 's largest explosions in the last few million years . 2: Volcanic activity triggers 2,000 to 3,000 small earthquakes per year , and the shake and shock waves travel at different speeds through molten , hot and other rock . 3: Scientist measured the thousands of small earthquakes in Yellowstone to scan the earth underneath it .

A: 1: Yellowstone 's previous eruptions 2: 2,000 to 3,000 small earthquakes per year 3: small earthquakes in Yellowstone
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Q: 1: Reports show an increasing number of retired NFL players who have suffered concussions developed memory and cognitive issues such as dementia , Alzheimer 's disease , depression and chronic traumatic encephalopathy , or CTE . 2: Her husband , former Denver Bronco Shane Dronett , committed suicide in 2009 when he was 38 . 3: Some former players who suffered from conditions related to concussions have committed suicide .

A:
1: an increasing number of retired NFL players who have suffered concussions 2: Her husband , former Denver Bronco Shane Dronett 3: Some former players who suffered from conditions related to concussions
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