In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.

Passage: Alexis Sánchez is a Chilean professional footballer who represents the Chile national football team as a striker. Nicknamed El Niño Maravilla ("The Boy Wonder"), he made his debut for his country in a 1–0 victory over New Zealand in April 2006. His first international goal came on his eighth appearance for Chile when he scored Chile's only goal in a 2–1 defeat to Switzerland in a friendly tournament in Vienna. , Sánchez is his country's top scorer and has the most caps, with 43 goals in 132 appearances. He passed the previous record of 37, held by Marcelo Salas, when he scored the opening goal against Germany in the group stage of the 2017 FIFA Confederations Cup in June 2017. He scored most recently against Ecuador in a 2–1 win during the 2019 Copa América. Despite Sánchez scoring seven goals, making him second-equal top scorer in 2018 FIFA World Cup qualifying (along with Lionel Messi, Gabriel Jesus and Felipe Caicedo), Chile failed to qualify for the finals. Sánchez made his most recent and 132nd appearance for Chile in a 0–0 draw against Colombia in October 2019.
 Link Information: Alejandro Sánchez Sánchez (; born 19 December 1988) Answer: 17
How old was Sánchez when he made his debut for the Chile national football team against New Zealand?

Passage: MacIntyre was born in Redondo Beach, California to Douglas R. and Carole C. (Williams) MacIntyre and has a younger brother, Todd (born 1988) and a younger sister, Katelyn (born 1991). MacIntyre started playing the piano by ear when he was three years old. He was taught by a neighborhood piano teacher near their home in Redondo Beach, California. At six years of age, he began training in classical music. When Scott turned 10, the family moved to Toronto, Ontario, Canada. They lived there for four years, and in that time Scott studied at the Royal Conservatory of Music. The MacIntyre family then relocated to Arizona and Scott studied under Walter Cosand, a university professor of Arizona State University. He was home-schooled until the age of 14, when he was admitted into Arizona State University's Barrett Honors College and Herberger College of the Arts. Scott won the 2004 Arizona Young Artists Competition at Herberger Theater in the vocal division. In 2005, USA Today named him one of its twenty College Academic All-Stars. In 2005, MacIntyre performed as a guest soloist with the Phoenix Symphony. The same year, MacIntyre was diagnosed with kidney disease and in November 2006, he had to spend ten months undergoing dialysis, severely hampering his capacity to perform and travel. In 2007 on August 22, Walter Cosand's wife Patricia donated her kidney to MacIntyre, which saved his life. He graduated from ASU in 2005, and he was received in the White House by Laura Bush as one of the RFB&D (Recording for the Blind and Dyslexic) scholarship winners in 2006. He obtained his master's degree at Royal Holloway, University of London and the Royal College of Music, where he studied on a Marshall Scholarship, one of the most competitive scholarships in the United States, awarded to only 40 American students each year.
 Link Information: Redondo Beach (Spanish for round) is coastal city in Los Angeles County, California, United States, located in the South Bay region of the Greater Los Angeles area. Answer:  Los Angeles County
What county was MacIntyre born in?

Passage: The establishment of Decoration Day as an official government holiday (by proclamation, not by law) swiftly occurred, and the holiday was almost immediately a popular one. At Arlington cemetery, the number of people attending the annual event swiftly overwhelmed the limited facilities. The first Decoration Day event was held in front of Arlington House. James A. Garfield, a former Major General in the Union Army (and future President of the United States), addressed a "large crowd" from the mansion's back steps. The following year, President Ulysses S. Grant closed the federal government for the holiday, and most businesses followed, which greatly contributed to attendance at the cemetery. A dais seating 400 people was erected in what remained of "the Grove" at the rear of Arlington House to accommodate speakers and dignitaries—which, for the first time, included President Grant. The Civil War Unknowns Monument, which was located south-southwest of Arlington House, was covered by a canopy. Several American flags hung from the canopy, red-white-and-blue bunting was draped along the monument's top, and numerous floral tributes were laid against it. An estimated 25,000 people attended the event throughout the day. Two sites for ceremonies were used in 1870. A very large speakers' dais was erected near the Sheridan Gate and McClellan Gate on the cemetery's east side, and used for speeches throughout the day. For the more important speakers, a second dais seating 200 was erected at the rear of Arlington House (although not with "the Grove"). A stand, permitting the seating of 500, was built nearby for a grand chorus (which sang for the crowd). Again, the Civil War Unknowns Monument was canopied and decorated. About 20,000 people attended the event that year, with rain keeping the numbers low. In 1871, the speakers' dais moved back to "the Grove" and expanded to accommodate 300 people. Frederick Douglass, the former African American slave and abolitionist, was the featured speaker that year. "Hundreds" of people attended his address, including President Grant. The dais moved again in 1872, this time to a location a few yards to the south of the Civil War Unknowns Monument. The dais was slightly reduced in size so that it only sat 200, but it now included a thrust on which stood a speaker's podium. More than 5,000 people attended the 1872 event.
 Link Information: The Civil War Unknowns Monument, which was located south-southwest of Arlington House, was covered by a canopy. Answer: 1865 

In what year was the Civil War Unknowns Monument built?