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*

Ex Input:
1: Los Angeles ( CNN ) Even as major airports across the country clamp down on employee screening , a lone wolf could still potentially slip through security , a top airport official said . 2:  I agree that in any airport throughout the United States and here also , there is never a 100 % guarantee that somebody who wanted to do something illegal or wrong could n't make that happen ,  Gannon said . 3: Still , there 's never a 100 % guarantee of safety , airport official says .

Ex Output:
1: airports 2: airport 3: airport


Ex Input:
1: The subjects were then asked to rate the photos according to how unpleasant or pleasant they were . 2: Those who took the acetaminophen rated all the photos less extremely than those who took the placebo . 3: Subjects taking acetaminophen reacted less strongly to both pleasant and unpleasant photos .

Ex Output:
1: the photos 2: all the photos 3: both pleasant and unpleasant photos


Ex Input:
1: Everyone at Kenya 's Garissa University College suffered in some way when a handful of Al-Shabaab gunmen stormed the campus early this month . 2: This tactic of separating non-Muslims from Muslims mirrors what Al-Shabaab attackers did in December at a quarry in the Kenyan village of Kormey , where at least 36 were killed , according to the Kenyan Red Cross . 3: Al-Shabaab has singled out non-Muslims to kill them , as at a Garissa University College .

Ex Output:

1: Al-Shabaab gunmen 2: Al-Shabaab attackers 3: Al-Shabaab