I want to know the answer to the following question:
How many suburban villes nouvelles did Paul Delouvrier constuct?
All the background I'm provided with is that "Paul Delouvrier promised to resolve the Paris-suburbs mésentente when he became head of the Paris region in 1961: two of his most ambitious projects for the Region were the construction of five suburban villes nouvelles ("new cities") and the RER commuter train network.". Is that enough to answer the question?