Question: What medal did this Eritrean-born American long distance runner who was coached by Bob Larsen win during the 2004 Olympics?

full_context: Document 1: Bob Ladouceur: Robert Eugene "Bob" Ladouceur (born July 3, 1954) is a retired American football coach. He began coaching the De La Salle High Spartans in Concord, California in 1979, when he was 25 years old. He took over a program that had never enjoyed a winning season since the school's establishment in 1965. His first season as head coach resulted in their first winning season. His second season resulted in their first appearance in the California Prep Football State Rankings and began De La Salle's evolution into a perennial champion. From 1992 to 2004, he guided the team to 12-consecutive undefeated seasons, setting a national winning streak record for high school football of 151 consecutive wins—a record in US amateur sports matched only by the 159-game winning streak of Passaic High School in men's basketball, and the 459 match win streak of Brandon High School in men's wrestling. Ladouceur was enshrined to the National High School Hall of Fame in 2001. His team has topped the USA Today rankings five times and he is a three-time coach of the year. He retired on January 4, 2013 with a career record of 399–25-3. His .934 winning percentage is a record among coaches with 200 or more wins. Ladouceur is the all-time winningest coach in California high school football and has led the De La Salle program to numerous championships.
Document 2: Bob King (speed coach): Bob King (born August 20, 1954) is an American Strength and Conditioning coach with a focus on speed training. He played college football at Texas Tech University. He was the Strength and Conditioning coach for the Dallas Mavericks, Dallas Burn (now FC Dallas), Assistant Strength and conditioning coach for the Dallas Cowboys and Push Coach for the US Skeleton team.
Document 3: Shalane Flanagan: Shalane Flanagan (born July 8, 1981) is an American long-distance runner. She holds the American record times in the 3000 m (indoor), 5000 m (indoor) and 15K road race. She won the bronze medal at the 2008 Olympics in the 10,000 m (since upgraded to silver), a bronze at the 2011 IAAF World Cross Country Championships and was second in the 2010 New York City Marathon.
Document 4: Tim Broe: Tim Broe (born June 20, 1977 in Peoria, Illinois) is a retired American long-distance runner. He reached the 5000 meters final at the 2004 Summer Olympics finishing eleventh. Tim competed collegiately for the University of Alabama where his 3,000m steeplechase record still stands. He is a cross country running and track and field coach. In his second year of coaching Wellesley High School boys cross country, the team won the MIAA Division State Cross Country Championships
Document 5: Edward Cheserek: Edward Cheserek (born 2 February 1994) is a professional runner for Skechers. Edward was a 17 time NCAA champion collegiate distance runner for the University of Oregon. Cheserek was the most highly recruited high school distance runner in the nation out of Saint Benedict's Preparatory School in New Jersey where he was named the Gatorade 2012-2013 National Cross Country Runner of the Year. In 2013, Cheserek became the first freshman in Oregon history to win the NCAA National Cross Country Championships. After repeating as NCAA cross country champion his sophomore and junior years, on November 19, 2016, Cheserek failed in his attempt to become the first collegiate runner to claim 4 NCAA Division I national titles in cross country, coming in third behind Patrick Tiernan of Villanova and Justyn Knight of Syracuse. In total, Cheserek has 17 NCAA National Titles.
Document 6: Atsede Baysa: Atsede Baysa Tesema, also known as Atsede "Bayisa" (born 16 April 1987), is an Ethiopian long-distance runner who specialises in road running events. She has won the Chicago Marathon, Boston Marathon and Paris Marathon twice. She has also won at the Xiamen International Marathon and the Istanbul Marathon.
Document 7: Lemi Berhanu Hayle: Lemi Berhanu Hayle, also known as Berhanu Lemi, (Amharic: ለሚ ብርሃኑ ኃይሌ ; born 13 September 1994) is an Ethiopian long-distance runner who specialises in the marathon. He competed in the marathon event at the 2015 World Championships in Athletics in Beijing, China, placing 15th. His personal best of 2:04:33 hours, set in 2015, ranks him in the world's top 15 athletes for the distance (as of 2016). In April 2016, he won the Boston Marathon.
Document 8: Bill Squires: William Squires is an American track and field coach. He is well known for coaching the Greater Boston Track Club at the height of its marathon success, including marathoner Bill Rodgers, Alberto Salazar, Dick Beardsley and Greg Meyer.
Document 9: Jerry Schumacher: Jerry Schumacher is an American coach for the sport of track and field, specializing in distance running. He has coached Olympic bronze medalist and the former American women's 10k record holder Shalane Flanagan, former Canadian 10k record holder Simon Bairu, the former men's American 10k record holder Chris Solinsky, the men's American two mile record holder Matt Tegenkamp, and the women's NCAA 10k record holder Lisa Koll. Prior to 2008 he was the head coach of the University of Wisconsin–Madison track and field team.
Document 10: Elias &quot;Coach&quot; Korcoulis: Elias Korcoulis, known to his friends as Lou and to thousands others as Coach (1940 – March 4, 2006) was the cross-country and track coach for Hollis/Brookline High School in Hollis, New Hampshire from 1962 until his death. Coach was an alumnus of Manchester High School Central, having lived in Manchester all his life. Coach would then go on to Phillips Exeter Academy and Keene State College. He began working at Hollis/Brookline in 1962 and started the cross-country, winter track, and spring track programs. During his career, Coach led the Hollis/Brookline Cavaliers to twenty-six state championships.
Document 11: Alberto Salazar: Alberto Salazar (born August 7, 1958) is an American track coach and former world-class long-distance runner. Born in Cuba, Salazar immigrated to the United States as a child with his family. They moved to Manchester, Connecticut and then to Wayland, Massachusetts, where Salazar competed in track and field in high school. Salazar is best known for his performances in the New York City Marathon in the early 1980s and his 1982 Boston Marathon victory known as the "Duel in the Sun." He held American track records of 13:11.93 for 5,000 m (July 6, 1982 – Stockholm) and 27:25.61 for 10,000 m – (June 26, 1982 – Oslo).
Document 12: Meb Keflezighi: Mebrahtom "Meb" Keflezighi ( ; Ge'ez: መብራህቶም ክፍልእዝጊ, "Mebrāhtōm Kifl'izgī"; born May 5, 1975) is an Eritrean-born American long distance runner. He is the 2004 Olympic silver medalist in the marathon and finished in fourth place in the 2012 Summer Olympics. He won the 2009 New York City Marathon on November 1, 2009, and the 2014 Boston Marathon on April 21, 2014, becoming the first American man to win each race since 1982 and 1983, respectively. Keflezighi is a graduate of UCLA where he won four NCAA championships competing for the UCLA Bruins track and field team. He came in fourth in the 2014 New York City Marathon on November 2, 2014, eighth in the 2015 Boston Marathon on April 20, 2015 and second in the 2016 U.S. Olympic Team Trials to qualify for the 2016 Summer Olympics.
Document 13: Bill Bowerman: William Jay "Bill" Bowerman (February 19, 1911 – December 24, 1999) was an American track and field coach and co-founder of Nike, Inc. Over his career, he trained 31 Olympic athletes, 51 All-Americans, 12 American record-holders, 22 NCAA champions and 16 sub-4 minute milers. During his 24 years as coach at the University of Oregon, the Ducks track and field team had a winning season every season but one, attained 4 NCAA titles, and finished in the top 10 in the nation 16 times. As co-founder of Nike, he invented some of their top brands, including the "Cortez" and "Waffle Racer", and assisted in the company moving from being a distributor of other shoe brands to one creating their own shoes in house.
Document 14: Marílson Gomes dos Santos: Marílson Gomes dos Santos (born 6 August 1977) is a Brazilian long-distance runner. He won the 2006 and 2008 New York City Marathon, becoming the first South American to win the race. He was selected as the best male performer at the 2009 Brazilian national championships after breaking the meet records in both the 5000 metres and 10,000 metres races. He is the current South American record holder in both these events with times of 13:19.43 and 27:28.12, respectively.
Document 15: Bob Larsen: Bob Larsen (born c. 1939) is a Hall of Fame Track and field athletics coach, known largely for coaching distance runners, though he has had success coaching across a full range of events. Larsen is currently a coach at the Mammoth Lakes Mammoth Track Club high altitude training camp. His most notable athlete is Mebrahtom Keflezighi, the 2004 Olympic Silver medalist in the Marathon, an accomplishment that ended a 20-year drought in United States distance running medals at the Olympic level (28 years for male athletes). Building on that success, Keflezighi won the men's division of the 2009 New York Marathon, the first American athlete to accomplish that feat since Alberto Salazar did it 27 years before in 1982, and the 2014 Boston Marathon. Previous to that Larsen coached the UCLA Cross Country and then Track teams between 1979 and his retirement in 1999.
ground_truth: silver