Question: Italian professional racing driver, Alex Zanardi, has held the drivers' title in the Italian Superturismo Championship, established in what year?

Context paragraphs:
Italian Superturismo Championship: The Italian Superturismo Championship (Campionato Italiano Superturismo) is Italy's national motorsport series for touring cars.  It was established in 1987 and its drivers' title has been held by such notable drivers as Le Mans winner Emanuele Pirro and two-time Champ Car champion Alex Zanardi.

1996 Italian Superturismo Championship: The 1996 Italian Superturismo Championship was the tenth edition of the Italian Superturismo Championship.  The season began in Mugello on 14 April and finished in Vallelunga on 6 October, after ten rounds.  Rinaldo Capello won the championship, driving an Audi A4 Quattro; BMW won the constructors' championship, while Roberto Colciago took the privateers' trophy.

1993 Italian Superturismo Championship: The 1993 Italian Superturismo Championship is the seventh edition of the Italian Superturismo Championship.  The season began in Monza on 21 March and finished in Mugello on 3 October, after ten rounds.  Roberto Ravaglia won the championship, driving a BMW 318i; the German manufacturer won the constructors' championship, while Amato Ferrari won the privateers' trophy.

1999 Italian Superturismo Championship: The 1999 Italian Superturismo Championship season was the thirteenth edition of the Italian Superturismo Championship.  The season began in Misano on 17 April and finished in Vallelunga on 10 October, after ten rounds.  Fabrizio Giovanardi won the championship, driving an Alfa Romeo 156; the Italian manufacturer won the constructors' championship, while Roberto Colciago took the privateers' trophy.

1994 Italian Superturismo Championship: The 1994 Italian Superturismo Championship is the eighth edition of the Italian Superturismo Championship.  The season began in Monza on 10 April and finished in Mugello on 2 October, after ten rounds.  Emanuele Pirro won the championship, driving an Audi 80 Quattro; the German manufacturer won the constructors' championship, while Moreno Soli won the privateers' trophy.

1992 Italian Superturismo Championship: The 1992 Italian Superturismo Championship is the sixth edition of the Italian Superturismo Championship.  The season began in Monza on 21 March and finished on the same racetrack on 18 October, after ten rounds.  Nicola Larini won the "S1 Class" (Group A cars), driving an Alfa Romeo 155 GTA, while Fabrizio Giovanardi won the "S2 Class" (Super Touring cars).

1998 Italian Superturismo Championship: The 1998 Italian Superturismo Championship was the twelfth edition of the Italian Superturismo Championship.  The season began in Binetto on 17 May and finished in Vallelunga on 4 October, after ten rounds.  Fabrizio Giovanardi won the championship, driving an Alfa Romeo 156; the Italian manufacturer won the constructors' championship, while Fabian Peroni took the privateers' trophy.

1997 Italian Superturismo Championship: The 1997 Italian Superturismo Championship was the eleventh edition of the Italian Superturismo Championship.  The season began in Monza on 20 April and finished in Vallelunga on 12 October, after ten rounds.  Emanuele Naspetti won the championship, driving a BMW 320i; the German manufacturer won the constructors' championship, while Massimo Pigoli took the privateers' trophy.

1995 Italian Superturismo Championship: The 1995 Italian Superturismo Championship is the ninth edition of the Italian Superturismo Championship.  The season began in Misano on 23 April and finished in Vallelunga on 8 October, after ten rounds.  Emanuele Pirro won the championship, driving an Audi A4 Quattro; the German manufacturer won the constructors' championship, while Mauro Trione won the privateers' trophy.

Alex Zanardi: Alessandro "Alex" Zanardi (] ; born 23 October 1966) is an Italian professional racing driver and paracyclist.

Supporting paragraphs: Italian Superturismo Championship Alex Zanardi
Answer: 1987