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*

1: ( CNN ) Suspected Boko Haram militants this week attacked civilians inside Cameroon for the first time in a month , killing at least 16 villagers , a military spokesman told CNN Saturday . 2: Six attackers were killed by Cameroonian forces , said Maj . Nlate Eballe , an operations officer with a special military unit set up to fight Boko Haram . 3: Six Boko Haram militants were killed , military spokesman says .
1: Suspected Boko Haram militants 2: Six attackers 3: Six Boko Haram militants

1: However , it is encouraging that both Shia and Sunni fighters are supporting the army in its effort to defeat ISIS . 2: Politically , these groups may not see eye-to-eye and of course there remain deep ethno-sectarian tensions in Iraq and beyond , but regardless of these differences they all view ISIS as a common threat and enemy that must be defeated . 3: Both Shia and Sunni groups view ISIS as a common threat and enemy that must be defeated , he adds .
1: both Shia and Sunni fighters 2: these groups 3: Both Shia and Sunni groups

1: Two staffers from the agency are scheduled to meet the West Coast-based ship in San Diego on Monday . 2: The Infinity left San Diego on March 29 . 3: The ship , which is based on the West Coast , left San Diego in late March .

1: the West Coast-based ship 2: The Infinity 3: The ship