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: Two scientists are suggesting that the inner solar system once played host to a bunch of  super-Earths  -- planets that were larger than our own but smaller than Neptune . 2: He and his co-author -- Gregory Laughlin of University of California , Santa Cruz -- are building on a scenario of Jupiter 's migration that was previously put forward by other scientists . 3: Scientists : An epic migration by Jupiter led to destruction of  super-Earths 

1: Two scientists 2: He and his co-author -- Gregory Laughlin of University of California , Santa Cruz 3: Scientists