Question:  Hong Kong first competed at a Deaflympics that was held in what US city?

Context paragraphs:
2012–13 Sun Hei SC season: The 2012–13 season is Sunray Cave JC Sun Hei's 12th season in the Hong Kong First Division League.  They start as the defending champions having won the Senior Challenge Shield last season.  As the champions of 2011–12 Hong Kong Senior Challenge Shield, they will compete in the 2013 AFC Cup.  They will also be competing in the Hong Kong First Division League and the FA Cup.

Hong Kong at the Olympics: Hong Kong first competed at the Olympic Games in 1952, then as a British colony.  Hong Kong has participated at every Summer Olympic Games (14 summer, 4 winter) since then except for the boycotted 1980 Games, and has also participated in the Winter Olympic Games since 2002.

2012–13 Tuen Mun SA season: The 2012–13 season is Tuen Mun Sports Association's 3rd consecutive season in the Hong Kong First Division League, the top flight of Hong Kong football.  Tuen Mun will seek to win their first trophy for two seasons, competing in the Hong Kong First Division League, the Hong Kong League Cup and the Hong Kong FA Cup after finishing 6th in the previous First Division League season.

Hong Kong at the Deaflympics: Hong Kong first competed at the Deaflympics for the first time way back in 1985.  Since then Hong Kong has been participating at the Deaflympics.  Hong Kong won it's first medal during the 2009 Summer Deaflympics, which is also the only medal bagged by them in Deaflympic history.

1985 Summer Deaflympics: The 1985 Summer Deaflympics, officially known as the 15th Summer Deaflympics, is an international multi-sport event that was celebrated from July 10 to July 20, 1985, in Los Angeles, California United States.

Sung Lin Yung: Stephen Sung Lin Yung (born 7 May 1965 in Tianjin) is a retired Chinese football player who represented the Hong Kong football team.  Starting his career in China he played for the Chinese U-20 and the Chinese Olympic team before he established himself with Chinese top tier side Tianjin where he played as a forward.  Moving away from China he joined Hong Kong football team South China and became their utility player playing anywhere on the field, though he spent most of time as a defensive midfielder where he had a successful time with them winning several cups and the 1996–97 Hong Kong First Division League title with them.  He would then become a Hong Kong permanent resident before he played for the Hong Kong national team and played a major role in Hong Kong's World Cup Qualifiers in 1997.  By 1998, he moved to other Hong Kong football teams Sing Tao and then Instant-Dict before he retired.

Cyprus at the Deaflympics: Cyprus first competed at the Deaflympics way back in 1997. Since then Cyprus has been participating at the Deaflympics regularly.  Cyprus won it's first Deaflympic medal for bowling at the 2013 Summer Deaflympics Cyprus has never participated in the Winter Deaflympics.

2015–16 Hong Kong FA Cup: The 2015–16 Hong Kong FA Cup is the 41st season of Hong Kong FA Cup.  It is a knockout competition, consisting of the preliminary round and the proper round.  42 teams from the Hong Kong First Division League, the Hong Kong Second Division League and the Hong Kong Third Division League competed in the preliminary round.  The 9 teams from the Premier League and the top 3 teams from the preliminary round competed in the proper round.  Hong Kong Pegasus won their 2nd title on 15 May 2016.

2015–16 Hong Kong FA Cup Preliminary Round: The 2015–16 Hong Kong FA Cup is the 41st season of the Hong Kong FA Cup.  42 teams from the Hong Kong First Division League, the Hong Kong Second Division League and the Hong Kong Third Division League competed in the preliminary round.  The top 3 teams from the preliminary round (Sun Hei, Tai Po, Wanchai) qualified for the proper round.

2013–14 Hong Kong First Division League: The 2013–14 Hong Kong First Division League, officially named 2013–14 HKFA RedMR Hong Kong First Division League due to sponsorship reasons, is the 102nd season of the First Division League since its establishment.  It will be a transition season before the new Premier League gets under way in autumn 2014.  Therefore, this is also the last ever First Division that is the top division in the Hong Kong football league system.

Supporting paragraphs: Hong Kong at the Deaflympics 1985 Summer Deaflympics
Answer: Los Angeles