This Python fragment starts by initializing a list called "peliculas"
containing movie titles. Then, it inserts additional elements into the
list. The second, fourth, and sixth elements are release years
corresponding to the movies in the list. The third, fifth, and eighth
elements are nested lists representing the protagonist and supporting
actors for each movie.

After defining the list, there is a function named "imprimir_lista" defined.
This function takes a list as input and iterates over each element. If an
element is itself a list (which indicates it contains nested information
about actors), the function recursively calls itself to print out each
element within that nested list. If an element is not a list, it simply
prints out the element.

Overall, the fragment sets up a list of movies with associated information
and provides a function to print out all the elements of the list,
handling nested lists appropriately.
