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: See if you can figure out Cheryl 's birthday , the Singapore logic problem that 's got the Internet twisted into knots . 2: The puzzling problem went viral after Singapore television host Kenneth Kong posted it to Facebook . 3: A logic question about  Cheryl 's birthday  goes viral .

1: got the Internet twisted into knots 2: went viral 3: goes viral