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 ) ISIS militants kidnapped 20 foreigners working at a Libyan hospital , then released them -- under the condition , if they want to live , that they stay put so they can treat members of the Islamist extremist group , a hospital official said . 2: About 30 gunmen tied to the group calling itself the Islamic State stormed Ibn Sina Hospital in Sirte on Monday while a bus was waiting to take the workers to Tripoli , Libya 's capital . 3: About 30 gunmen stormed the Sirte hospital , took 20 foreigners captive .

1: 20 foreigners working at a Libyan hospital 2: the workers 3: 20 foreigners