Question: How many city-based franchises are featured in the competition of which the "2016–17 Cool & Cool Present Jazz National T20 Cup" was the thirteenth season?

Context articles: 2011 Faysal Bank Super Eight T20 Cup
2015 Haier Super 8 Twenty20 Cup
Zeeshan Malik
2015–16 Haier T20 Cup
Arsal Sheikh
National Twenty20 Cup
Irfanullah Shah
2014–15 Haier T20 Cup
2013 Ramadan T20 Cup
2016–17 National T20 Cup

The 2011 Faysal Bank Super Eight T20 Cup was the first season of the Faysal Bank Super Eight T20 Cup.
 The tournament was held from 24 June in Faisalabad, between the top eight teams from the 2010–11 Faysal Bank T20 Cup.
 The winners were awarded ₨ 2.5 million in prize money while the runners-up received ₨ 1 million.
 The Rawalpindi Rams won the tournament by defeating the Karachi Dolphins in the final in the Super Over.
The Cool & Cool presents Haier Super 8 T20 Cup 2015 was the fourth season of the Haier Super 8 T20 Cup.
 It was played between May 11, 2015 and May 18, 2015 at the Iqbal Stadium in Faisalabad.
Zeeshan Malik (born 26 December 1996) is a Pakistani cricketer.
 He made his Twenty20 debut on 8 September 2016 for Rawalpindi in the 2016–17 National T20 Cup.
 Prior to his T20 debut, he was part of Pakistan's squad for the 2016 Under-19 Cricket World Cup.
 He made his first-class debut for Rawalpindi in the 2016–17 Quaid-e-Azam Trophy on 1 October 2016.
The Haier Q8 T20 CUP 2015-2016 is the Twelve season of the National T20 Cup in Pakistan, sponsored by Haier.
The qualifying round of the event commences on Sept. 1 and runs up to Sept. 5, 2015.
 Eight Teams will participate in qualifying round.
 The Winner of both semi-finals of qualifying round shall make it to the main round.
Arsal Sheikh (born 22 January 1997) is a Pakistani cricketer.
 He made his List A debut on 28 April 2016 for Islamabad in the 2016 Pakistan Cup.
 Prior to his debut, he was named in Pakistan's squad for the 2016 Under-19 Cricket World Cup.
 He made his Twenty20 debut on 31 August 2016 for Lahore Whites in the 2016–17 Cool & Cool Present Jazz National T20 Cup.
 He made his first-class debut for Islamabad in the 2016–17 Quaid-e-Azam Trophy on 22 October 2016.
The National T20 League is a men's professional Twenty20 cricket league in Pakistan, established in 2005.
 It has 18 franchised member clubs and a member of the Pakistan Cricket Board, which is recognized by the ICC.
 Established in 2005, it is one of the world's oldest Twenty20 cricket leagues and was replaced by the Pakistan Super League in 2016, which currently features 5 city-based franchises from within Pakistan.
 The top 8 teams in the annual tournament qualify for the Super-8 T20 Cup tournament.
 The league's team offices are directed out of its head offices located at Gaddafi Stadium in Lahore.
Irfanullah Shah (born 5 May 1995) is a cricketer from Bannu, Pakistan.
 He made his Twenty20 debut on 26 August 2016 for Federally Administered Tribal Areas in the 2016–17 Cool & Cool Present Jazz National T20 Cup.
The Haier T20 Cup 2014-15 is the eleventh season of the National T20 Cup in Pakistan, sponsored by Haier.
 The tournament started on September 17, 2014 at Karachi which was relocated from Multan due to torrential rains and flooding in Punjab.
 A total of 18 Teams divided into four groups participated in this tournament.
The 2013 Ramadan T20 Cup (also known as Pepsi Presents Advance Telecom Ramadan T20 Cup) is the first season of the Advance Telecom Ramadan T20 Cup in Pakistan, which was held form 6 to 25 July 2013.
The 2016–17 Cool & Cool Present Jazz National T20 Cup was a Twenty20 domestic cricket competition in Pakistan that took place in August and September 2016 with eight teams competing.
 It was the thirteenth season of the National Twenty20 Cup in Pakistan.