Question: When did the 1979-80 European Cup winner win the FA Cup?

Knowledge 1: 1979–80 European Cup
The 1979–80 season of the European Cup football club tournament was won by holders Nottingham Forest in the final against Hamburg. The winning goal was scored by John Robertson, who drilled the ball into the corner of the Hamburg net from outside the penalty area. Forest became the only side to win the European Cup more times than their domestic top flight league, a record which still stands. [SEP] Knowledge 2: Nottingham Forest F.C.
Forest were founder members of the Football Alliance in 1889 before joining the Football League in 1892. They have since mostly competed in the top two League tiers except five seasons in the third tier. Forest won the FA Cup in 1898 and 1959. Their most successful period was in the management reign of Brian Clough and Peter Taylor between 1976 and 1982. With Forest they won the 1977 -- 78 Football League title followed by the 1979 and 1980 European Cups. They also won two Football League Cups at Forest together. After Taylor left Clough won two more League Cups and two Full Members Cups.
Knowledge 1: 1979–80 European Cup
The 1979–80 season of the European Cup football club tournament was won by holders Nottingham Forest in the final against Hamburg. The winning goal was scored by John Robertson, who drilled the ball into the corner of the Hamburg net from outside the penalty area. Forest became the only side to win the European Cup more times than their domestic top flight league, a record which still stands. [SEP] Knowledge 2: FA Cup
The FA Cup winners qualify for the following season's UEFA Europa League (formerly named the UEFA Cup; until 1998 they entered the Cup Winners' Cup instead). This European place applies even if the team is relegated or is not in the English top flight. In the past, if the FA Cup winning team also qualified for the following season's Champions League or Europa League through their league position, then the losing FA Cup finalist was given the Europa League place instead. FA Cup winners enter the Europa League at the group stage. Losing finalists, if they entered the Europa League, began earlier, at the play-off or third qualifying round stage. From the 2015–16 UEFA Europa League season, however, UEFA will not allow the runners-up to qualify for the Europa League through the competition.
Knowledge 1: 1979–80 European Cup
The 1979–80 season of the European Cup football club tournament was won by holders Nottingham Forest in the final against Hamburg. The winning goal was scored by John Robertson, who drilled the ball into the corner of the Hamburg net from outside the penalty area. Forest became the only side to win the European Cup more times than their domestic top flight league, a record which still stands. [SEP] Knowledge 2: List of UEFA club competition winners
Real Madrid hold the record for the most overall titles, with 22 followed by Milan's 17 titles. Spanish teams hold the record for the most wins in each of the three main UEFA club competitions: Real Madrid, with thirteen European Cup / UEFA Champions League titles; Sevilla, with five UEFA Cup / UEFA Europa League titles; and Barcelona, with four Cup Winners' Cup titles. Milan share the most Super Cup wins (five) with Barcelona, and the most Intercontinental Cup wins (three) with Real Madrid. German clubs Hamburg, Schalke 04 and Stuttgart, and Spanish club Villarreal are the record holders by titles won in the UEFA Intertoto Cup (twice each).

Answer: 1898 and 1959