input: Cho attended the Poplar Tree Elementary School in Chantilly, an unincorporated, small community in Virginia's Fairfax County. According to Kim Gyeong-won, who met Cho in the fifth grade and took classes with him, Cho finished the three-year program at Poplar Tree Elementary School in one and a half years. Cho was noted for being good at mathematics and English, and teachers pointed to him as an example for other students. At that time, according to Kim, nobody disliked Cho and he "was recognized by friends as a boy of knowledge;... a good dresser who was popular with the girls." Kim added that "I only have good memories about him." An acquaintance noted that "Every time he came home from school he would cry and throw tantrums saying he never wanted to return to school" when Cho first came to the U.S. in about the second grade.  In 1999, during the spring of Cho's eighth grade year, the Columbine High School massacre made international news and Cho was transfixed by it. "I remember sitting in Spanish class with him, right next to him, and there being something written on his binder to the effect of, you know, ' 'F' you all, I hope you all burn in hell,' which I would assume meant us, the students," said Ben Baldwin, a classmate of Cho. Cho also wrote in a school assignment about wanting to "repeat Columbine". The school contacted Cho's sister, who reported the incident to their parents. Cho was sent to a psychiatrist.  Cho attended secondary schools in Fairfax County, including Ormond Stone Middle School in Centreville and Westfield High School in Chantilly, and by eighth grade had been diagnosed with selective mutism, a social anxiety disorder which inhibited him from speaking. Through high school, he was bullied for his shyness and unusual speech patterns. According to Chris Davids, a high school classmate in Cho's English class at Westfield High School, Cho looked down and refused to speak when called upon. Davids added that, after one teacher threatened to give Cho a failing grade for not participating in class, he began reading in a strange, deep voice that sounded "like he had something in his mouth. [...]" While several students recalled instances of Cho being bullied and mocked at Westfield, most left him alone and later said they were not aware of his anger. While in high school, the Columbine High school shooting would provide a great source of inspiration for Cho. Cho idolized the two killers. He was "compelled to replicate the Columbine boys, even out do them," which he did in terms of the number of victims  Cho graduated from Westfield High School in 2003.

Answer this question "When did his behavioral problems begin?"
output: when Cho first came to the U.S. in about the second grade.

Problem: Background: Lindsey Caroline Vonn (nee Kildow ; born October 18, 1984) is an American World Cup alpine ski racer on the US Ski Team. She has won four World Cup overall championships--one of only two female skiers to do so, along with Annemarie Moser-Proll--with three consecutive titles in 2008, 2009, and 2010, plus another in 2012. Vonn won the gold medal in downhill at the 2010 Winter Olympics, the first ever in the event for an American woman. She has also won a record 8 World Cup season titles in the downhill discipline (2008-2013, 2015, 2016), 5 titles in super-G (2009-2012, 2015), and 3 consecutive titles in the combined (2010-2012).
Context: At the Vancouver Winter Olympics in 2010, Vonn planned to compete in all five women's alpine events. On February 10, she revealed she had severely bruised her shin in training the previous week. Vonn said the pain from her injury was "excruciating" and she would have a difficult time competing at the Winter Olympics. Due to unseasonably warm weather and resultant poor snow conditions, many of the Alpine skiing events were moved back, giving Vonn additional time to heal. On February 17, in her first event, Vonn won the gold medal in the downhill at Whistler Blackcomb, beating longtime U.S. rival Julia Mancuso by 0.56 seconds and becoming the first American woman to win Olympic gold in downhill.  In her second event, the super combined, Vonn finished first in the downhill portion of the race. In the slalom portion, however, she crashed when she failed to get her ski around a right-hand gate. Vonn said her shin wasn't the problem. Gold and silver were won by Maria Riesch and Julia Mancuso respectively.  In her third event, the super-G, Vonn finished third behind Andrea Fischbacher and Tina Maze, 0.74 seconds behind Fischbacher's winning time. Afterwards, Vonn said she didn't ski the last part of the course as aggressively as she could have and lost the race as a result. In her fourth event, the giant slalom, fog affected visibility. Vonn crashed in her first run, resulting in a broken fourth finger and Vonn's disqualification from the event. In her fifth event, the slalom, Vonn lost control and straddled a gate, disqualifying her from the event.
Question: How did she perform in the 2010 Winter Olympics?
Answer: in her first event, Vonn won the gold medal in the downhill

Question: The Powhatan People (sometimes Powhatans) (also spelled Powatan) are an Indigenous group traditionally from Virginia. In some instances, The Powhatan, may refer to one of the leaders of the people. This is most commonly the case in historical writings by the English. The Powhatans have also been known as Virginia Algonquians, as the Powhatan language is an eastern-Algonquian language also known as Virginia Algonquian.

The capital village of "Powhatan" was believed to be in the present-day Powhatan Hill section of the eastern part of Richmond, Virginia, or perhaps nearby in a location which became part of Tree Hill Farm.  Another major center of the confederacy about 75 miles (121 km) to the east was called Werowocomoco. It was located near the north bank of the York River in present-day Gloucester County.  Werowocomoco was described by the English colonists as only 15 miles (24 km) as the crow flies from Jamestown, but also described as 25 miles (40 km) downstream from present-day West Point, measurements which conflict with each other. In 2003 archaeologists initiated excavations at a site in Gloucester County that have revealed an extensive indigenous settlement from about 1200 (the late Woodland period) through the early Contact period. Work since then has added to their belief that this is the location of Werowocomoco. The site is on a farm bordering on Purtain Bay of the York River, about 12 nautical miles (22 km) from Jamestown. The more than 50 acres (200,000 m2) residential settlement extends up to 1,000 feet (300 m) back from the river. In 2004, researchers excavated two curving ditches of 200 feet (60 m) at the far edge, which were constructed about 1400 CE. In addition to extensive artifacts from hundreds of years of indigenous settlement, researchers have found a variety of trade goods related to the brief interaction of Native Americans and English in the early years of Jamestown.  Around 1609, Wahunsunacock shifted his capital from Werowocomoco to Orapakes, located in a swamp at the head of the Chickahominy River, near the modern-day interchange of Interstate 64 and Interstate 295. Sometime between 1611 and 1614, he moved further north to Matchut, in present-day King William County on the north bank of the Pamunkey River, not far from where his brother Opechancanough ruled one of the member tribes at Youghtanund.

Using a quote from the above article, answer the following question: why?
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