All the major sets were constructed "simultaneously" because of the schedule.
The third and last set of buildings was constructed in 1864-1865.
The interior sets for the houses are constructed as required.
More generally consider the following random process where a set is constructed as follows.
A new set can also be constructed by determining which members two sets have "in common".
For the first time a huge set was constructed across the river in Kandi.
The change also required a new, larger set to be constructed within a theatre.
In 2006, a new set of buildings were constructed for the school.
Four interior sets were constructed for the most important locations of the film.
The set is constructed to resemble a typical public library.