Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Berlin Modernism Housing Estates' has mentioned 'Urban planning' in the following places:
Occurrence Sentence Text Source
Dating mainly from the years of the Weimar Republic (1919xe2x80x931933), when the city of Berlin was particularly progressive socially, politically and culturally, they are outstanding examples of the building reform movement that contributed to improving housing and living conditions for people with low incomes through innovative approaches to architecture and urban planning.