How to create dynamic text change in virtual tour?

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Good afternoon!
There are several virtual tours on the server created with krpano.
At the transition point (hotspot), using the url attribute, you can switch to another virtual tour located in another folder.
The page contains a description of the current virtual tour.
But I want to make it so that when switching to another virtual tour, the description from the previous tour would change to the description of the tour to which we switched.
All virtual tour code is contained in xml files.
How can this be done?