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: Seven of those on the helicopter were Marines based at Camp Lejeune , North Carolina . 2: Four served with the Louisiana National Guard . 3: Seven were Marines ; four served with Louisiana National Guard .

1: Marines based 2: served 3: served