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: Nigeria overtook South Africa last year as the region 's largest economy . 2: As many as 70 % of Nigerians live below the poverty line , surviving on less than a dollar a day . 3: Nigeria is also Africa 's biggest economy , but up to 70 % of Nigerians live on less than a dollar a day .

1: Nigeria 2: Nigerians 3: Nigeria