Question: In which city were the 2017 UCI Mountain Bike World Championships held; a city within the largest country in Oceania and the world's sixth largest country by total area?

Context paragraphs:
1996 UCI Mountain Bike World Championships: The 1996 UCI Mountain Bike World Championships was the 7th edition of the UCI Mountain Bike World Championships.  The events included were cross-country and downhill.

1998 UCI Mountain Bike World Championships: The 1998 UCI Mountain Bike World Championships were held in Mont-Sainte-Anne, Quebec, Canada from 14 to 20 September 1998.  The disciplines included were cross-country and downhill.  The event was the 9th edition of the UCI Mountain Bike World Championships and the second to be held in Canada, following the 1992 World Championships in Bromont.

Christophe Dupouey: Christophe Dupouey (8 August 1968 in Tarbes – 4 February 2009 in Tarbes) was a French mountain biker.  In 1996 he won the gold medal in the men's cross country section of the UCI Mountain Bike World Cup.  In 1998 he won the gold medal in the same section of the UCI Mountain Bike & Trials World Championships.  Dupouey also competed in the 1996 and 2000 Olympic Games, placing 4th in Atlanta.

2017 UCI Mountain Bike World Championships: The 2017 UCI Mountain Bike World Championships was the 28th edition of the UCI Mountain Bike World Championships.  As in 2016, the championships in the various disciplines were held at separate events.  The world championships in four-cross were held at Val di Sole, Italy, on 24 and 25 August 2017, alongside UCI World Cup events in cross-country and downhill.  The world championships in cross-country and downhill were held in Cairns, Australia, from 5 to 10 September 2017.

1999 UCI Mountain Bike World Championships: The 1999 UCI Mountain Bike World Championships were the 10th edition of the UCI Mountain Bike World Championships and were held in Åre in the North of Sweden.  The events included were cross-country and downhill.

UCI Mountain Bike Marathon World Championships: The UCI Mountain Bike Marathon World Championships is the world championship event for marathon mountain bike races.  Inaugurated by the Union Cycliste Internationale in 2003, the event is held annually in single classes for men and women.  The 2003 event was organized as part of the UCI Mountain Bike & Trials World Championships.  Subsequent marathon world championships, however, have been organised as a stand-alone event.

Jolanda Neff: Jolanda Neff (born 5 January 1993) is a Swiss cross-country cyclist who also competes on the road for Servetto Footon.  She was the overall winner of the UCI Mountain Bike World Cup in 2014 and 2015.  She was triple U23 Mountain Bike World Champion (2012, 2013 and 2014).  At the 2017 UCI World Championships in Cairns she became the elite world champion.

1997 UCI Mountain Bike World Championships: The 1997 UCI Mountain Bike World Championships were held in Château-d'Œx, Switzerland from 18 to 21 September 1997.  The disciplines included were cross-country and downhill.  The event was the 8th edition of the UCI Mountain Bike World Championships and the first to be held in Switzerland.

UCI Mountain Bike World Cup: The UCI Mountain Bike World Cup is a multi-round mountain bike racing series that is sanctioned by the Union Cycliste Internationale.  The first World Cup series – which was composed of cross-country events – was held in 1989.  The Downhill World Cup was inaugurated two years later, and the Dual Slalom World Cup was launched in 1998.  The dual-slalom format – which involved knock-out heats with two riders on the parallel courses in each heat – evolved into four-cross (with four riders on a single course per heat) in 2002 before being dropped after the 2011 season.  Riders win points according to their placing in each event.  The reigning series leaders in each class are identified by a special jersey.  The UCI Mountain Bike World Cup is broadcast live and globally on Red Bull TV.

Australia: Australia ( , , ), officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania and numerous smaller islands.  It is the largest country in Oceania and the world's sixth-largest country by total area.  The neighbouring countries are Papua New Guinea, Indonesia and East Timor to the north; the Solomon Islands and Vanuatu to the north-east; and New Zealand to the south-east.  Australia's capital is Canberra, and its largest urban area is Sydney.

Supporting paragraphs: 2017 UCI Mountain Bike World Championships Australia
Answer: Cairns