Question: Cup Winners' Cup Chelsea's Gus Poyet was born on which day?
Context: The Soviet Cup, or USSR Cup (Russian: Кубок СССР ), was the premier football cup competition in the Soviet Union conducted by the Football Federation of the Soviet Union.  The winner of the competition was awarded a qualification to the UEFA Cup Winners' Cup, unless it already qualified for the European Cup, in turn passed the qualification to the finalist.  In case if a team would win the UEFA Cup Winners' Cup and not win its national league cup titles next year, it qualified to the UEFA Cup Winners' Cup along with the new cup holder. The 1997 UEFA Cup Winners' Cup Final was a football match contested between Barcelona of Spain and the cup holders Paris Saint-Germain of France, to determine the winner of the 1996–97 UEFA Cup Winners' Cup and the 37th overall Cup Winners' Cup final.  It was held at Feijenoord Stadion in Rotterdam on 14 May 1997.  Barcelona won the match 1–0 thanks to a Ronaldo penalty.  The final saw the last instance of the Cup Winners' Cup "jinx" that no club had successfully retained the cup in successive seasons — with Paris Saint-Germain failing to defend the trophy that they won in 1996. The 1991 European Super Cup was the 16th UEFA Super Cup, an annual football match contested by the winners of the previous season's European Cup and Cup Winners' Cup competitions.  The match was played on 19 November 1991 and featured the 1990–91 European Cup winners, Red Star Belgrade, and Manchester United, winners of the 1990–91 Cup Winners' Cup.  It was meant to be played over two legs, but due to the political unrest in Yugoslavia at the time, UEFA decided that only the Old Trafford leg would be played.  Manchester United won the match 1–0, with Brian McClair scoring the winning goal in the 67th minute. Diego Poyet González (born 8 April 1995) is a professional footballer who plays as a midfielder for Cypriot First Division side Pafos.  His father is former Uruguay international footballer Gus Poyet. Washington Andres Vincente Diego Augusto Poyet Carreras ( Washington Poyet )(12 January 1939 – 16 June 2007) was a Uruguayan basketball player who competed in the 1960 Summer Olympics and in the 1964 Summer Olympics.  He was the father of footballer Gus Poyet, and the grandfather of Diego Poyet. The 1994 European Cup Winners' Cup Final was a football match on 4 May 1994 contested between Arsenal of England and Parma of Italy.  It was the final match of the 1993–94 European Cup Winners' Cup and the 34th European Cup Winners' Cup Final.  The final was held at the Parken Stadium in Copenhagen, and Arsenal won 1–0 with the goal coming from Alan Smith.  It is widely considered as the peak of Arsenal's famous defence.  Arsenal became the fourth London club to win the trophy after Tottenham Hotspur, Chelsea and West Ham United. Gustavo Augusto "Gus" Poyet Domínguez (] ; born 15 November 1967) is a Uruguayan former footballer. The 1998 UEFA Super Cup was a football match that was played on 28 August 1998 at Stade Louis II, Monaco, contested between Champions League winners Real Madrid and Cup Winners' Cup holders Chelsea.  Neither team had previously won the trophy.  Chelsea won the match 1–0 with a late goal from Gus Poyet. The 1998 UEFA Cup Winners' Cup Final was a football match that took place on 13 May 1998 at Råsunda Stadium in Stockholm, Sweden to determine the winner of the 1997–98 UEFA Cup Winners' Cup.  It was contested by Chelsea of England and Stuttgart of Germany and was the 38th final of what was then Europe's second largest football competition, the UEFA Cup Winners' Cup. The Asian Cup Winners' Cup was an association football competition run by the Asian Football Confederation (AFC).  The competition was started in 1991 as a tournament for all the domestic cup winners from countries affiliated to the AFC.  The winners of the Cup Winners Cup used to contest the Asian Super Cup against the winners of the Asian Champions' Cup.  The most successful clubs in the competition are Al Hilal from Saudi Arabia and Nissan FC from Japan.
Answer: 15 November 1967