Question: What is the length of the track where the 2013 Liqui Moly Bathurst 12 Hour was staged?

Context articles: Mount Panorama Circuit
2016 Intercontinental GT Challenge
Bathurst 12 Hour
2018 Intercontinental GT Challenge
2016 Liqui Moly Bathurst 12 Hour
2017 Intercontinental GT Challenge
2013 Liqui Moly Bathurst 12 Hour
2015 Liqui Moly Bathurst 12 Hour
2017 Liqui Moly Bathurst 12 Hour
2014 Liqui Moly Bathurst 12 Hour

Mount Panorama Circuit is a motor racing track located in Bathurst, New South Wales, Australia.
 It is situated on a hill with the dual official names of Mount Panorama and Wahluu and is best known as the home of the Bathurst 1000 motor race held each October, and the Bathurst 12 Hour event held each February.
 The 6.213 km long track is technically a street circuit, and is a public road, with normal speed restrictions, when no racing events are being run, and there are many residences which can only be accessed from the circuit.
The 2016 Intercontinental GT Challenge was the first season of the Intercontinental GT Challenge.
 The season featured three rounds — after the cancellation of the 6 Hours of the Americas - starting with Liqui Moly Bathurst 12 Hour on 7 February and the season concluded with the Sepang 12 Hours on 10 December.
The Bathurst 12 Hour (currently known as the Liqui Moly Bathurst 12 Hour for sponsorship reasons) is an endurance race for GT and production cars held at the Mount Panorama Circuit, in Bathurst, Australia in February each year.
 The race was first held in 1991 for Series Production cars and moved to Sydney's Eastern Creek Raceway in 1995 before being discontinued.
 The race was revived in 2007, again for production cars, before adding a new class for GT3 and other GT cars in 2011.
 This has led to unprecedented domestic and international exposure for the event.
 In all, sixteen races have taken place; fifteen at Mount Panorama and one at Eastern Creek Raceway.
The 2018 Intercontinental GT Challenge will be the third season of the Intercontinental GT Challenge.
 The season will feature four rounds, starting with the Liqui Moly Bathurst 12 Hour on 4 February, and concluding with the California 8 Hours on 21 October.
The 2016 Liqui Moly Bathurst 12 Hour was an endurance race for a variety of GT and touring car classes, including: GT3 cars, GT4 cars and Group 3E Series Production Cars.
 The event, which was staged at the Mount Panorama Circuit, near Bathurst, in New South Wales, Australia on 7 February 2016, was the fourteenth running of the Bathurst 12 Hour.
 It was also the opening round of the 2016 Intercontinental GT Challenge Series.
The 2017 Intercontinental GT Challenge will be the second season of the Intercontinental GT Challenge.
 The season features four rounds, starting with the Liqui Moly Bathurst 12 Hour on 5 February, and concluding with the Sepang 12 Hours on 10 December.
 Laurens Vanthoor is the defending drivers' champion and Audi is the defending manufacturers' champion.
The 2013 Liqui Moly Bathurst 12 Hour was an endurance race for a variety of GT and touring car classes, including: GT3 cars, GT4 cars, Group 3E Series Production Cars and Dubai 24 Hour cars.
 The event, which was staged at the Mount Panorama Circuit, near Bathurst, in New South Wales, Australia on 10 February 2013, was the eleventh running of the Bathurst 12 Hour.
 The race also incorporated the opening round of the 2013 Australian GT Championship.
 The Australian GT Championship was to compete as the first hour only and cars were permitted to enter for only that hour or to cross-enter for both the first hour and continue for the endurance race.
The 2015 Liqui Moly Bathurst 12 Hour was an endurance race for a variety of GT and touring car classes, including: GT3 cars, GT4 cars and Group 3E Series Production Cars.
 The event, which was staged at the Mount Panorama Circuit, near Bathurst, in New South Wales, Australia on 8 February 2015, was the thirteenth running of the Bathurst 12 Hour.
The 2017 Liqui Moly Bathurst 12 Hour endurance race for GT and touring car classes, GT3 and GT4 cars was staged on the Mount Panorama Circuit, near Bathurst, in New South Wales, Australia 5 February 2017.
 The 15th running of the Bathurst 12 Hour constituted the opening round of the 2017 Intercontinental GT Challenge Series.
 For the first time, the winners of the race were awarded the Australian Tourist Trophy.
The 2014 Liqui Moly Bathurst 12 Hour was an endurance race for a variety of GT and touring car classes, including: GT3 cars, GT4 cars and Group 3E Series Production Cars.
 The event, which was staged at the Mount Panorama Circuit, near Bathurst, in New South Wales, Australia on 9 February 2014, was the twelfth running of the Bathurst 12 Hour.