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: It 's unknown if Lubitz mentioned his problems on a form that asks yes-or-no questions about physical and mental illness , suicide attempts and medications . 2: European pilots must fill out the form to be recertified . 3: European pilots must fill out forms that ask about mental and physical illnesses .

1: Lubitz 2: European pilots 3: European pilots