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 all part of National Park Week , happening April 18 through April 26 , and it 's hosted by the National Park Service and the National Park Foundation . 2: Check out night-time astronomy parties , daytime Revolutionary War programs , Earth Day parties and family-friendly Junior Ranger activities at national park sites across the country . 3: Stargazing , Revolutionary War programs and other fun happens this week .

1: National Park Week 2: night-time astronomy parties , daytime Revolutionary War programs , Earth Day parties and family-friendly Junior Ranger activities 3: Stargazing , Revolutionary War programs and other fun