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: Sanaa , Yemen ( CNN ) Al Qaeda fighters attacked a prison in the coastal Yemeni city of Al Mukallah early Thursday , freeing at least 270 prisoners , a third of whom have al Qaeda links , a senior Defense Ministry official has told CNN . 2: Dozens of attackers took control of government buildings , including the city 's Central Prison , Central Bank and radio station during the assault early Thursday , according to officials . 3: Al Qaeda fighters attack a prison and other government buildings , freeing many prisoners .

SOLUTION: 1: Al Qaeda fighters 2: Dozens of attackers 3: Al Qaeda fighters

PROBLEM: 1: Cuba has historically been the wrench in the diplomatic machinery , with some Latin American leaders threatening not to attend the Summit of the Americas if the United States and Canada did n't agree to invite President Raul Castro . 2: Later , Obama issued an executive order sanctioning seven Venezuelan officials for human rights violations and saying the country was a  threat to national security .  3: U.S. , Venezuelan relations threaten to overshadow Obama , Castro meeting .

SOLUTION: 1: Latin American 2: Venezuelan 3: Venezuelan

PROBLEM: 1: Since mid-December , 16 states have seen bird flu turn up in commercial poultry , backyard chickens , and in flocks of wild and captive wild birds , according to the CDC . 2: The virus does not spread through people eating chickens or eggs . 3: You ca n't get bird flu from eating poultry or eggs .

SOLUTION:
1: bird flu 2: The virus 3: bird flu