The task is about reading the given story and question, then finding an answer to the given question. Based on the passage provided and the given question, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

story: The Oscars ceremony at the 87th Academy Awards took place in Hollywood's 3,300-seat Dolby Theatre in California on Sunday evening(Feb.23, 2015). The night concluded with the biggest award of the evening, Best Picture. After already securing the Best Screenplay and Best Director Award for Alejandro Gonzalez Inarritu, Birdman took flight as the winner of the night.

Competing with 7 other contenders including another much-predicted winner "Boyhood", the top prize of the night was finally awarded to the film "Birdman". The director of "Birdman" was also awarded the Best Director Oscar by the Academy. In addition, the film took home two other awards for Best Original Screenplay and Cinematography.

Starring Michael Keaton, the dark comedy "Birdman" tells the story of a faded Hollywood star, famous for his roles as the "Birdman superhero", who struggles to win the support and confidence to perform in a different character type in a Broadway show.

The Academy's Best Leading Actor award went to Eddie Redmayne, for his performance in the film "the Theory of Everything". It was the actor's first nomination and first win.

Meanwhile, the Best Leading Actress award went to Julianne Moore who plays a college professor who learns that she is suffering from early-onset Alzheimer's disease.

Patricia Arquette also won her first Oscar for her supporting actress role in the movie "Boyhood", while J.K. Simmons won the Best Supporting Actor in "Whiplash".

Best foreign Language film went to "Ida", while "Crisis Hotline" won the award for Best Documentary Short Subject., question: Where did the Oscars ceremony take place?
They took place in Hollywood's 3,300-seat Dolby Theatre in California.

story: The University of Chicago (UChicago, Chicago, or U of C) is a private research university in Chicago. The university, established in 1890, consists of The College, various graduate programs, interdisciplinary committees organized into four academic research divisions and seven professional schools. Beyond the arts and sciences, Chicago is also well known for its professional schools, which include the Pritzker School of Medicine, the University of Chicago Booth School of Business, the Law School, the School of Social Service Administration, the Harris School of Public Policy Studies, the Graham School of Continuing Liberal and Professional Studies and the Divinity School. The university currently enrolls approximately 5,000 students in the College and around 15,000 students overall.

University of Chicago scholars have played a major role in the development of various academic disciplines, including: the Chicago school of economics, the Chicago school of sociology, the law and economics movement in legal analysis, the Chicago school of literary criticism, the Chicago school of religion, and the behavioralism school of political science. Chicago's physics department helped develop the world's first man-made, self-sustaining nuclear reaction beneath the university's Stagg Field. Chicago's research pursuits have been aided by unique affiliations with world-renowned institutions like the nearby Fermilab and Argonne National Laboratory, as well as the Marine Biological Laboratory. The university is also home to the University of Chicago Press, the largest university press in the United States. With an estimated completion date of 2020, the Barack Obama Presidential Center will be housed at the university and include both the Obama presidential library and offices of the Obama Foundation., question: What will be completed in 2020?
the Barack Obama Presidential Center

story: (CNN) -- In the middle of the Idaho wilderness, a man on horseback had a brief conversation with two campers. The rider's realization later that he may have been talking to California Amber Alert suspect James DiMaggio and his alleged teenage captive has now focused a nationwide manhunt for the pair on the rugged mountain area in central Idaho.

The horseback rider saw the man and girl Wednesday and struck up a brief conversation with them, Andrea Dearden, spokeswoman for the Ada County Sheriff's Office, said Friday.

He was not aware of the manhunt at the time, but he called the Amber Alert tip line after he saw a news account that night and realized the pair matched the description of DiMaggio and 16-year-old Hannah Anderson, she said.

The rider's impression of the pair was "it seemed odd but nothing as alarming," Dearden said.

"They did speak and exchange pleasantries. I don't think there was a lot of information exchanged," she said. "He left the conversation believing they were camping in the area."

The rider said the man and girl were on foot, hiking with camping gear, Dearden said.

Dearden appeared to be correcting authorities' earlier reports that the suspect and girl were spotted by more than one horseback rider.

Investigators set up checkpoints where DiMaggio and Hannah were believed to be traveling in the River of No Return Wilderness area, about 15 miles outside Cascade, Dearden said.

Authorities haven't yet evacuated any homes or businesses, she said, adding, "We have those access points secured." , question: Who is Andrea Dearden?
spokeswoman for the Sheriff's Office