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 ) On the morning of April 19 , 1995 , a man parked a rental truck packed with explosives in front of the Alfred P . Murrah Federal Building in Oklahoma City . 2: Opinion : Homegrown extremist threat remains 20 years after Oklahoma City bombing . 3: April 19 marks 20 years since the Oklahoma City bombing .

1: a rental truck packed with explosives in front of the Alfred P . Murrah Federal Building in Oklahoma City 2: Oklahoma City bombing 3: the Oklahoma City bombing