Question: Who finished wiht the silver medal at the competition held in Sofia, Bulgaria?

Context articles: Sofia Trophy
James Cygan
List of Olympic medalists in volleyball
Eugenia Golea
Boyan Yordanov
EuroBasket Women 1960
John Lindsay (Paralympian)
Che Mian
1989 Winter Universiade
Federico Grabich

The Sofia Trophy is an international figure skating competition held yearly in Sofia, Bulgaria.
 Medals may be awarded in men's and ladies' singles on the senior, junior, and novice levels.
 It is part of the European Criterium.
James Cygan is an American former figure skater.
 He is the 1982 Nebelhorn Trophy bronze medalist, 1986 Golden Spin of Zagreb bronze medalist, and 1989 Winter Universiade silver medalist.
 He belonged to the Broadmoor Skating Club in Colorado Springs, Colorado.
Volleyball is one of the sports that is played at the Summer Olympic Games in two disciplines: the traditional six-per-side indoor game, and the newer game of beach volleyball.
 Indoor volleyball was added to the Olympic programme in 1957 at the 53rd session of the International Olympic Committee (IOC) in Sofia, Bulgaria, and the first competitions were held at the 1964 Summer Olympics in Tokyo.
 The Soviet Union won a medal in both the men's and women's competition at the first five Olympics that included volleyball, including the men's gold medal in Tokyo.
 The Japanese women's team won the gold at the inaugural Olympic volleyball competition, and the silver at the following two Games.
 The Montreal Games of 1976 saw the Polish men win the nation's only gold medal in the sport, after the women had won bronze in 1964 and 1968.
 At the 1980 Moscow Olympics, the hosts won gold in both competitions.
 The Bulgarian team won their only two volleyball medals in Moscow, a silver and a bronze in the men's and women's tournament, respectively.
Eugenia Golea (born March 10, 1971) is a retired Romanian artistic gymnast, who competed in international events between 1984 and 1988.
 She is known for scoring a perfect 10 for the vault optional in the team competition of the 1987 World Artistic Gymnastics Championships and for being the first gymnast to compete two consecutive layout stepout jumps.
 She helped her team to win an Olympic silver medal, a world title and a world silver medal.
 She liked all the events equally, though she excelled in vaulting and floor.
 On vault she won a world silver medal and a continental bronze and on beam she won a continental silver medal.
Boyan Yordanov (Bulgarian: Боян Йорданов ) is a Bulgarian volleyball player, member of the Bulgaria men's national volleyball team.
 Born on March 12, 1983 Boyan started his career in Levski (Siconco) Sofia and is currently playing for A.O.P. Kifissia in Greece.
 Boyan made his first cap for Bulgaria in a match against France on the 2006 World Championship in Osaka.
 He entered as a sub in the third game with France leading 2:0.
 At the end, Bulgaria won 3:2.
 Bulgaria got to the bronze medals on the same WC.
 He has got a silver medal from the 2003 U-21 World Championship in Iran as well.
The 1960 European Women's Basketball Championship was the 7th regional championship held by FIBA Europe for women.
 The competition was held in Sofia, Bulgaria and took place June 3–11, 1960.
 The Soviet Union won the gold medal, while hosts Bulgaria received the silver.
 Czechoslovakia won the bronze medal.
John Lindsay, OAM (born 29 January 1970) is an Australian Paralympic athlete from Melbourne.
 He competed in the 1988 Seoul games in distances ranging from 100 m to 800 m, but did not win any medals.
 At the 1992 Barcelona Games, he won a gold medal in the Men's 200 m TW3 event, for which he received a Medal of the Order of Australia, a silver medal in the Men's 100 m TW3 event and a bronze medal in the Men's 400 m TW3 event.
 That year, he had a Victorian Institute of Sport scholarship.
 He was also working as a fitness instructor in 1992, held world records in the 100 m and 200 m events, and was ranked 6th in the world in the 400 m.
 He won a gold medal in the men's athletics 100 m T52 event at the 1996 Summer Paralympics with a time of 15.22, a silver medal in the 200 m T52 event with a time of 27.38, and a bronze medal in the 400 m T52 event with a time of 52.93.
 At the 2000 Sydney Games, he won a gold medal in the Men's 100 m T53 event, a silver medal as part of the Men's 4x100 m Relay T54 team, and a bronze medal in the Men's 200 m T53 event; he was also part of the Men's 4x400 m Relay T54 team, which was the only one to qualify in its heat, but it did not make it to the finals.
 At the 2004 Athens Games, he came seventh in the first round of the Men's 100 m T53 event and sixth in the third round of the Men's 200 m T53 event.
 He was an Australian Institute of Sport scholarship holder in 1995 and 2000.
He competed in the 2004 Summer Paralympics in Athens, Greece.
 There he won a silver medal in the men's 4 x 100 metre relay - T35-38 event, a silver medal in the men's 4 x 400 metre relay - T35-38 event, a bronze medal in the men's 100 metres - T36 event, finished sixth in the men's 200 metres - T36 event and finished fourth in the men's 400 metres - T36 event.
 He also competed at the 2008 Summer Paralympics in Beijing, China.
 There he won a silver medal in the men's 4 x 100 metre relay - T35-38 event, a bronze medal in the men's 200 metres - T36 event, a bronze medal in the men's 400 metres - T36 event and finished sixth in the men's 100 metres - T36 event
The 1989 Winter Universiade, the XIV Winter Universiade, took place in Sofia, Bulgaria.
Federico Grabich (born 26 March 1990) is an Argentine competitive swimmer.
 At the 2012 Summer Olympics he finished 41st overall in the heats in the Men's 100 metre backstroke and failed to reach the semifinals.
 Federico won the bronze medal at the 2011 Pan American Games and the gold and silver medal at the 2015 Pan American Games.
 At the South American Games he won ten medals (two of them were gold).
 At the 2015 Pan American Games, Grabich won the 100m Freestyle, setting a new Argentine record.
 He also won a silver medal in 200m, setting another Argentine record.
 In August 2015, he won the bronze medal at the World Championships, being the first medal for his country in a World Championship and the silver medal at the World Cup in Qatar.