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 latest example : Nine seconds of video of a number of boys singing an offensive song . 2: Immediately , the University of Oklahoma expelled two of the boys for their speech . 3: University of Oklahoma students were expelled after video surfaced of racist song .

1: an offensive song 2: their speech 3: racist song