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?
Sentence (from "2016–17 National T20 Cup"): 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.
Relevant evidence: Yes