| http://www.w3.org/ns/prov#value | - marshall join us today. >> thank you. my pleasure. >> we talk about the san francisco earthquake that was a fire that mostly devastated the city. how do we avoid that kind of problem. how can we reduce fire hazard? >> the construction was a lot different. we do not expect what we had then. we want to make sure with the gas heaters that the gas is shut off. >> if you shut it off you are going to hav
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