Question: Who scored the first goal of last season for Junior Mendes's team?

full_context: Document 1: Eddie Newton: As a player, he was a defensive midfielder from 1990 until 2001 notably for Chelsea where he scored in the 1997 FA Cup final. He also played in the Football League for Cardiff City, Birmingham City, Oxford United and Barnet and in the Conference National for Hayes. He also earnt two caps for the England U21 side.
Document 2: 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 3: 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 4: Jim Henry (footballer, born 1975): junior leagues with Lochee United. He returned to senior football in the summer of 2000, signing for Clyde. Henry never cemented his place as a first team regular at Clyde, and joined Stenhousemuir in March 2001. He went on to play for Forfar Athletic and Raith Rovers before returning to the juniors.
Document 5: 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 6: 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 7: Marcus Stewart: Stewart played over 500 games and scored over 250 goals in his professional career and had notable spells in the Premier League for Ipswich Town and Sunderland, and was the Premier League's second highest goalscorer for the 2000–01 season. He also played for Bristol Rovers, Huddersfield Town, Bristol City, Preston North End, Yeovil Town and Exeter City.
Document 8: Jesús Mendoza Aguirre: He spent the vast majority of his 18-year senior career with Xerez, competing in all three major levels of Spanish football and appearing in 459 official matches. He started working as a manager in 2014, with the same club.
Document 9: 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 10: 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 11: 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 12: 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 13: 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.
Document 14: History of Arsenal F.C. (1966–present): For the following season, Arsenal gradually progressed upon their league form, eventually becoming runners - up in 2016. In order to capture that ever - elusive Premier League title for the first time in 12 years, the club spent heavily in the transfer market in the summer of 2016, spending over £80 million on four first - team acquisitions, namely capturing Shkodran Mustafi and Granit Xhaka, who operate as a central defender and central midfielder, respectively. Both positions were long deemed problem positions in the team, with the hope Arsenal could push on and win the league after signing the pair. However, poor league form saw Arsenal competing heavily for the final UEFA Champions League space, 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, and the first ever under Wenger. However, Arsenal won the FA Cup Final 2 - 1 against Chelsea, making it their third win in four seasons, and made them the most successful club in the history of the competition.
Document 15: 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.
ground_truth: Bertrand Traoré
sub_queries: Junior Mendes >> member of sports team Answer: Chelsea
who scored Chelsea 's first goal last season Answer: Bertrand Traoré