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 ) The Solar Impulse 2 , the experimental plane attempting to fly around the world without using a drop of fuel , has been grounded by the weather in China . 2: Their mission , which the pilots say is aimed at proving the power of renewable energy , and inspiring innovation , has been 12 years in the making . 3: Solar Impulse 2 attempts to prove the power of renewable energy .

1: The Solar Impulse 2 , the experimental plane attempting to fly around the world without using a drop of fuel 2: Their mission 3: Solar Impulse 2