Question: Who scored the first goal of the 2016–17 season, for the team that Aziz Deen-Conteh plays for?

full_context: Document 1: Laurent Charvet: Charvet began his career at Cannes in 1994. Between then and 1997 he appeared 99 times for the club and scored 19 goals. In the 1997–98 season he was loaned out to the English Premier League team Chelsea for whom he appeared 11 times, scoring two goals in defeats to West Ham and Leeds. He was an unused substitute in Chelsea's UEFA Cup Winners' Cup final win over VfB Stuttgart.
Document 2: Jimmy Smith (footballer, born 1987): Smith began his career at Chelsea at the age of nine, progressing through the youth ranks before signing professional terms with the club in 2005. After featuring regularly for Chelsea's reserve side during the 2005–06 season, Smith made his first-team debut in May 2006. It turned out to be his only appearance for the club. The following season, he joined Championship side Queens Park Rangers on a season-long loan agreement, before spending three months on loan at Norwich City towards the latter months of 2007. Smith was loaned out once again ahead of the 2008–09 campaign, spending the first half of the season with Sheffield Wednesday. He returned to Chelsea in January 2009, only to join League One side Leyton Orient on a loan deal for the remainder of the season. Smith signed for Orient on a permanent basis in July 2009, signing a two-year contract. He spent four seasons with the club, making over 180 appearances in all competitions. He was released by Orient in April 2013, and signed for Stevenage ahead of the 2013–14 season. Smith has also represented England at various youth levels. Smith signed for League One side Crawley Town in May 2014 for an undisclosed fee.
Document 3: Anthony Grant (English footballer): Grant began his career at Chelsea, progressing through the youth ranks before making his first-team debut in 2005. Grant was loaned out four times during his time at Chelsea; briefly playing for Oldham Athletic in 2006, before spending the 2006–07 season at Wycombe Wanderers. He then joined Luton Town on loan in November 2007, spending a month with the club. Grant later joined Southend United in January 2008, on loan until the end of the 2007–08 campaign. He signed for Southend on a permanent basis ahead of the 2008–09 season, and spent four seasons with the club. In June 2012, Grant signed for Stevenage on a free transfer. After one season at Stevenage, Grant joined Crewe Alexandra. He remained with Crewe for two years, and moved on to Port Vale in June 2015. He was voted Port Vale's Player of the Year in 2015–16, before being sold on to Peterborough United in January 2017. He was bought by Shrewsbury Town in August 2018.
Document 4: Junior Mendes: As a player he was a striker from 1995 to 2015. Mendes began his career with Premier League side Chelsea in 1995, but was released at the 95-96 season. He went on to play in the Football League for Carlisle United, Mansfield Town, Huddersfield Town, Northampton Town, Grimsby Town, Notts County, Lincoln City and Aldershot Town, in Scotland with St Mirren, Dunfermline Athletic and Ayr United, and in English Non-league football with Stevenage Borough and Ilkeston Town. He has represented Montserrat six times, scoring 1 goal.
Document 5: Filipe Morais: Morais began his career at Chelsea, progressing through the youth system before signing a professional deal in 2005. Having made no first-team appearances for Chelsea, Morais was loaned out to Milton Keynes Dons in January 2006, spending the remainder of the 2005–06 campaign with the League One side. Ahead of the 2006–07 season, Morais joined Millwall on a free transfer. He spent half a season playing for Millwall, before joining St Johnstone on loan until the end of the season. Morais was released by Millwall on returning to the club, and subsequently signed for SPL club Hibernian on a free transfer in July 2007. He spent one-and-a-half years at the club, before signing for Inverness Caledonian Thistle in January 2009. He rejoined St Johnstone in the summer of 2009, and spent the 2009–10 campaign playing regularly for the club. Morais returned to England for the 2010–11 season, signing for Oldham Athletic in October 2010. In July 2012, he left Oldham and signed for Stevenage on a free transfer and has since turned out for Bradford City and Bolton Wanderers.
Document 6: Ryan Bertrand: Born in Southwark, London, Bertrand began his youth career at Gillingham, before signing for Chelsea in July 2005. He graduated from Chelsea's youth system and was sent on loan to various clubs between 2006 and 2010. He made his full debut for Chelsea on 20 April 2011, six years after joining them, in a fixture against Birmingham City. In the 2011–12 season, Bertrand signed a new four-year contract with Chelsea and was made understudy to Ashley Cole, whom he described a "fantastic role model." On 19 May 2012, Bertrand became the first player to make his Champions League debut in the final, starting in an unfamiliar left wing role in front of Cole; Chelsea beat Bayern Munich 4–3 on penalties. He has honours with Chelsea, including an FA Cup and UEFA Champions League titles.
Document 7: Lee Luscombe: Born in Guernsey, he started his youth career with Vale Recreation before joining Southampton as a trainee. After a couple of years, he left Southampton and returned to his home island for a short period. He then returned to the UK and signed for Brentford along with fellow Guernsey player Grant Chalmers. After playing 42 games over a two-year period he moved onto Millwall and then a short loan spell at Sittingbourne. His spell in the UK came to an end after 8 games with Doncaster Rovers. He then returned to his home island of Guernsey and played locally for a while. He later had spells as a goalkeeping coach at Warrington Town and Runcorn Linnets.
Document 8: Chelsea F.C.: In July 2003, Bates sold Chelsea to Russian billionaire Roman Abramovich for £140 million. Over £100 million was spent on new players, but Ranieri was unable to deliver any trophies, and was replaced by José Mourinho. Under Mourinho, Chelsea became the fifth English team to win back-to-back league championships since the Second World War (2004–05 and 2005–06), in addition to winning an FA Cup (2007) and two League Cups (2005 and 2007). After a poor start to the 2007–2008 season, Mourinho was replaced by Avram Grant, who led the club to their first UEFA Champions League final, which they lost on penalties to Manchester United.
Document 9: Gary Chivers: A central defender, Chivers began his career with Chelsea in 1979, and remained with the club until 1983, a poor period in the club's history. He then moved to Swansea City, followed by spells with Queens Park Rangers and Watford. He settled at Brighton & Hove Albion, enjoying a six-year stint with the club from 1987. He spent the summer of 1993 playing in Norway with Lyn Oslo before playing out his career at Bournemouth, retiring from professional football in 1995. He played non-league football in Sussex, becoming a chauffeur (with his own stretch-limo) for a living in Surrey before going on to work in the football-related media and in private coaching.
Document 10: Yasyn Khamid: Khamid is product of youth team systems of UFK Kharkiv. He spent 6 years played for FC Metalurh Donetsk Reserves and Youth Team and went on loan in the Ukrainian First League club FC Stal Alchevsk. He made his debut for FC Stal entering as a second-half substitute against FC Zirka Kirovohrad on 26 July 2014 in Ukrainian First League.
Document 11: Aziz Deen-Conteh: He represented England at youth level whilst on the books at Chelsea. He spent the 2013–14 season with Greek club Ergotelis, making seven appearances in the Greek Superleague. He joined Port Vale in November 2014, and was loaned out to Boston United in August 2015, but left Vale in January 2016 without making a first team appearance. He moved on to Moldovan side Zaria Bălți – winning the Moldovan Cup in 2016 – and Georgian side Zugdidi, before he returned to England in August 2017 to sign with Dover Athletic.
Document 12: History of Arsenal F.C. (1966–present): The 2016 / 17 season was one of Arsenal's most testing for competitions in Europe, having taken a race with Liverpool and Manchester City to the final day of the season. Despite winning 3 - 1 against Everton, results elsewhere meant they only finished fifth, missing out on a Champions League spot for the first time in two decades. However Arsenal won the FA Cup Final 2 - 1 against Chelsea. This was their third win in four seasons and made them the most successful club in the history of the competition.
Document 13: Wayne Rooney: During the first half of the 2006 -- 07 season, Rooney endured a ten - game scoreless streak before scoring a hat - trick against Bolton Wanderers. He subsequently signed a two - year contract extension the following month that tied him to United until 2012. In April 2007, he scored two goals in an 8 -- 3 aggregate Champions League quarter - final win over Roma and two more in the same competition later in the month, in a 3 -- 2 semi-final first leg victory over Milan. Rooney collected his first Premier League title winner's medal at the end of the 2006 -- 07 season. He scored 14 league goals that season.
Document 14: 2016–17 Chelsea F.C. season: Chelsea lost its first pre-season match, against Rapid Wien, which ended in a 2 -- 0 defeat. In the following match of its Austrian tour, Chelsea won 3 -- 0 against Wolfsberger AC, with youngsters Bertrand Traoré, Ruben Loftus - Cheek and Nathaniel Chalobah each scoring a goal. The following day, Chelsea had a closed - door friendly with local team Atus Ferlach, ending its Austrian tour with an 8 -- 0 win over the champions of the Austrian fourth - tier Kärntner Liga.
Document 15: 1985–86 Chelsea F.C. season: It was the first season under the management of John Hollins, who had previously been a member of Chelsea's victories in the 1970 FA Cup Final and 1971 European Cup Winners' Cup Final. On 1 January 1986 Chelsea were second, two points behind leaders Manchester United and in March the club were still in second, four points behind Everton with two games in hand. The two games in hand were lost 4–0 at home to West Ham United and 6–0 away at Queens Park Rangers. After gaining just 9 points from a possible 33 in the last 11 games, Chelsea finished 6th for the second season in succession.
ground_truth: Bertrand Traoré
sub_queries: Aziz Deen-Conteh >> member of sports team Answer: Chelsea
who scored Chelsea 's first goal last season Answer: Bertrand Traoré