question: what was built in the 1920 's and 1930 's
answer: New middle class residential areas , such as Tuindorp and Oog in Al , were built
turker_answer: In the 1920 's and 1930 's new middle class residential areas were built including those in Tuindorp and Oog in Al. .
rule-based: New middle class residential areas , such as Tuindorp and Oog in Al , were built was built in the 1920 's and 1930 's