TASK 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*
PROBLEM: 1: Lausanne , Switzerland ( CNN ) Nuclear talks intensified Sunday between world powers and Iran , but key sticking points remained unresolved as the countries tried to reach a deal to curb Tehran 's nuclear program ahead of a Tuesday deadline . 2: The speed of which U.N . sanctions could be lifted remains in dispute . 3: Another sticking point : When would U.N. sanctions be lifted ?

SOLUTION: 1: sticking points 2: dispute 3: sticking point

PROBLEM: 1: Historian John Ashdown-Hill , who discovered the genealogical link between Richard III and Michael Ibsen , says it is important that the King 's Catholic beliefs are recognized in the ceremonies . 2: Ashdown-Hill , who shares Richard III 's faith , has had a rosary , featuring the white Yorkist rose and a crucifix like one thought to have been owned by Richard III 's mother , made to be placed inside the coffin . 3: Bones will be buried in a coffin made by Richard III 's descendant , Michael Ibsen .

SOLUTION: 1: Richard III 2: Richard III 3: Richard III 's

PROBLEM: 1: ( CNN ) Robert Downey Jr . may be Iron Man in the popular Marvel superhero films , but he recently dealt in some advanced bionic technology himself . 2: Downey recently presented a robotic arm to young Alex Pring , a Central Florida boy who is missing his right arm from just above his elbow . 3:  Iron Man  star Robert Downey Jr. presents a young child with a bionic arm .

SOLUTION:
1: Robert Downey Jr 2: Downey 3: Iron Man '' star Robert Downey Jr.