What is the fine-grained topic of the following text: Based on Springer's lurid talk show, the production combines the musical, comedy and opera genres and has been described in the Observer as "The most explosive theatrical event for years, and the biggest thrill for decades", by Liam Gallagher as "The best f**cking thing I have ever seen" and of which Jerry Springer says "I only wish I'd thought of it first". Only return the topic.
Jerry Springer's musical, comedy and opera production