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: A first half goal from Welsh international Aaron Ramsey was enough to separate the two sides and secure Arsenal 's hold on second place . 2: Belgian international Christian Benteke scored the only goal of the game , his eighth in six matches , to secure a vital three points to give the Midlands club breathing space . 3: A goal from Aaron Ramsey secured all three points .

SOLUTION: 1: goal 2: goal 3: goal

PROBLEM: 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 .

SOLUTION: 1: Mars 2: Mars 3: Mars

PROBLEM: 1: ( CNN ) The United States and Great Britain have pulled their last forces out of strife-torn Yemen , raising fears that the failed state will become even more of a breeding ground for terror groups plaguing the Middle East and the West . 2: I do n't think there is an active role for the U.S . other than intelligence and trying to see where the dust is going to settle , said U.S . Sen . Angus King , a Maine Independent who serves on the Senate Armed Services and Intelligence committees . 3: With U.S. and UK forces gone , fears rise that terror could blossom in Yemen .

SOLUTION:
1: The United States 2: the U.S 3: U.S.