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 ) What does it take to help a single dolphin entangled in fishing line ? 2: And that was after four weeks spent finding him and evaluating his situation to see whether it warranted intervention . 3: It took about four weeks and an hour for rescuers to help a dolphin calf .

1: a single dolphin 2: him 3: a dolphin calf