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: Now , the tiny settlement of Tristan da Cunha is seeking the help of architects and designers the world over to secure its future well into the 21st century . 2: With the help of the Royal Institute of British Architects ( RIBA ) , the UK overseas territory is holding an international competition to improve aging infrastructure and make the island self-sustainable as it approaches the 200th anniversary of its settlement . 3: Tristan da Cunha holds competition for architects and designers .

1: the tiny settlement of Tristan da Cunha 2: the UK overseas territory 3: Tristan da Cunha