Given the task definition and input, reply with output. This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

In 2007, RIBA called for minimum space standards in newly built British houses after research was published suggesting that British houses were falling behind other European countries. "The average new home sold to people today is significantly smaller than that built in the 1920s... We're way behind the rest of Europe—even densely populated Holland has better proportioned houses than are being built in the country. So let's see minimum space standards for all new homes," said RIBA president Jack Pringle.
What did the Royal Institute support in order to keep up with housing in mainland Europe?