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: Scientists do n't know yet what causes mast cell disease . 2: Fruit , vegetables , milk , soy , nuts , smoke , perfume , the sun -- you name it , Brynn is allergic to it . 3: Brynn Duncan has mast cell disease , which causes her to be allergic to almost everything .

1: causes mast cell disease 2: allergic 3: allergic