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: Since 1996 , he and his team have discovered more than 80 ancient Mayan cities in the jungles of Mexico , few of which the modern world had known before . 2: But just why so many settlements were simply abandoned , long before the arrival of the Spanish conquistadors , remains a mystery to which these long lost sites may provide an answer . 3: His discoveries could help explain why so many Mayan cities were abandoned before the arrival of the Spaniards .

1: more than 80 ancient Mayan cities in the jungles of Mexico 2: so many settlements 3: so many Mayan cities