Question: The 1987–88 Football League season was Birmingham City Football Club's 85th in the Football League and their 35th in the Second Division, they finished in 19th position in the division, the 1987–1988 Football League season was which ordinal number completed season? 
Context: The 1990–91 Football League season was Birmingham City Football Club's 88th in the Football League and their second in the Third Division.  They finished in 12th position in the 24-team division.  They entered the 1990–91 FA Cup in the first round proper and lost to Brentford in the second, and entered at and lost in the first round of the League Cup, beaten over two legs by AFC Bournemouth.  They won the Football League Trophy, a cup competition open to clubs in the third and fourth tiers of the English football league system, defeating Tranmere Rovers 3–2 in the final at Wembley Stadium with goals from Simon Sturridge and two from John Gayle. The 1947–48 Football League season was Birmingham City Football Club's 45th in the Football League and their 19th in the Second Division.  They reached first place in the 22-team division after the match played on 6 December and retained that position for the remainder of the season, winning the Second Division title for the third time and gaining promotion to the First Division for 1948–49, from which they had been relegated at the end of the last completed pre-war season.  They entered the 1947–48 FA Cup at the third round proper and lost to Notts County in that round. The 1986–87 Football League season was Birmingham City Football Club's 84th in the Football League and their 34th in the Second Division, to which they were relegated in 1985–86.  They finished in 19th position in the 22-team division, and avoided a second successive relegation only by two points.  They entered the 1986–87 FA Cup in the third round proper and lost to Walsall in the fourth, and were eliminated from the League Cup in the third round by Tottenham Hotspur.  They entered the second season of the Full Members' Cup, a competition created for teams in the top two divisions after English clubs were banned from UEFA competitions following the Heysel disaster, and lost in the second round away to Charlton Athletic in front of a crowd of only 821. The 1983–84 Football League season was Birmingham City Football Club's 81st in the Football League and their 49th in the First Division.  They finished in 20th position in the 22-team division, so were relegated to the Second Division for 1984–85.  They entered the 1983–84 FA Cup in the third round proper and lost to Watford in the quarter-final.  In the League Cup, after defeating Notts County in the third round only after three replays, they lost to Liverpool in the fourth round after a replay. The 1987–88 Football League season was Birmingham City Football Club's 85th in the Football League and their 35th in the Second Division.  They finished in 19th position in the division, expanded for this season to 23 teams as part of a restructuring process, and again avoided relegation only by two points.  They entered the 1987–88 FA Cup in the third round proper and lost in the fifth round to Nottingham Forest, and were beaten by Mansfield Town over two legs in the first round of the League Cup and by Derby County in the first round of the Full Members' Cup. The 1992–93 Football League season was Birmingham City Football Club's 90th in the Football League.  They competed in the second tier of English football, renamed Division One following the Premier League's split from the Football League.  They were promoted to Division One in 1991–92, and finished in 19th position in the 24-team division, avoiding relegation back to the third tier on the final day of the season.  They lost in their opening first-round matches in both the 1992–93 FA Cup and the League Cup, and were eliminated at the group stage of the Anglo-Italian Cup. The 1946–47 Football League season – the first Football League season after the end of the Second World War – was Birmingham City Football Club's 44th in the Football League and their 18th in the Second Division, to which they were relegated at the end of the last completed season before the war.  They finished in third position in the 22-team division, three points adrift of the promotion places.  They entered the 1946–47 FA Cup at the third round proper and lost to Liverpool in the sixth (quarter-final). The 1960–61 Football League season was Birmingham City Football Club's 58th in the Football League and their 34th in the First Division.  They finished in 19th position in the 22-team division for the second consecutive season.  They entered the 1960–61 FA Cup in the third round proper and lost to Leicester City in the fifth round after a replay, and entered the inaugural season of the Football League Cup in the second round, losing to Plymouth Argyle in the third, again after a replay.  In the Inter-Cities Fairs Cup, Birmingham beat Inter Milan both at home and away in the semi-final to reach their second consecutive final, but the competition schedule meant that the match itself was played in September and October 1962, well into the 1961–62 playing season. The 1987–1988 season was the 89th completed season of The Football League. The 1961–62 Football League season was Birmingham City Football Club's 59th in the Football League and their 35th in the First Division.  They finished in 17th position in the 22-team division.  They entered the 1961–62 FA Cup in the third round proper and lost in that round to Tottenham Hotspur after a replay, and entered the League Cup at the first round, again losing their opening match after a replay, this time against Swindon Town.  Birmingham lost in the final of the 1960–61 Inter-Cities Fairs Cup in October 1961, and only a few weeks later, were eliminated from the 1961–62 competition in the second round by Espanyol.  This was Birmingham's last appearance in major European competition for nearly 50 years.
Answer: 89th