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*
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 .

1: a top airport official 2: Gannon 3: airport official