I want to know the answer to the following question:
How many residential buildings did not meet construction standards?
All the background I'm provided with is that "While stringent construction regulations are currently in place and recently built structures are earthquake-safe, as of 2007[update] the majority of the buildings in Israel were older than these regulations and many public buildings as well as 50,000 residential buildings did not meet the new standards and were "expected to collapse" if exposed to a strong quake.". Is that enough to answer the question?