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: The second student expelled , Pettit does not have much of a digital footprint . 2: What appears to be his now deleted Twitter page mainly focuses on his musings about college football . 3: Levi Pettit , the second student expelled , mainly focused on college football on social media .

1: a digital footprint 2: Twitter page 3: social media