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: ( CNN ) It was always going to take an extraordinary performance from a very talented swimmer to beat Michael Phelps at his favorite event in an Olympic final . 2: When the South African chased down Phelps in the final 50 meters of the race to snatch a dramatic fingertip victory by 0.05 seconds he created one of the defining moments of the 2012 London Olympics . 3: South African swimmer stunned Michael Phelps at 2012 London Olympics .

1: a very talented swimmer 2: the South African 3: South African swimmer