What is the fine-grained topic of the following text: According to 3 weeks(9/17/2017 to 10/1/2017) observed to the Lion King Musical performed on Saturday 10/21/2017, I find Ticketmaster has dynamic pricing their tickets: 9/24 to 10/1 adjusted the premium seats from $252 to $239. Only return the topic.
Dynamic pricing of Lion King Musical tickets by Ticketmaster