Given the task definition and input, reply with output. In this task you will be given a passage and a yes/no question based on the passage. You should answer the question using the information from the passage.

passage: Local versions of the show have been produced in nearly 30 countries, as well as one for the Arab world; in some countries, more than one version has been aired. The most popular name for the show is Dragons' Den or variations thereof, a name that originated in the United Kingdom. The show has also been titled Shark Tank (a name that originated in the United States) and Lions' Den, and variations on those names, among others. In versions where the name of the show contains a creature's name, the investors are referred to by that name.
question: is shark tank a copy of dragons den?
Yes