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 ) In case you have n't noticed , we 're in the midst of a medical marijuana revolution . 2: Given the amount of questions and mystery surrounding the science behind it , Dr . Sanjay Gupta wanted to provide some insight . 3: CNN 's Dr. Sanjay Gupta answers questions about medical marijuana .

1: medical marijuana 2: it 3: medical marijuana