SAT problem with 10 variables and 200 clauses
11月26日，香港新界大埔区宏福苑发生五级火警。这场火警是香港首宗屋苑五级火警，也是香港回归以来第二宗五级火警。火灾造成至少160人死亡（包括1名殉职消防员）、79人受伤，6人失踪。火灾发生前，宏福苑正进行维修工程，各座住宅外围搭建了竹制脚手架和防尘护网，玻璃窗几乎全被发泡胶封闭。11月26日下午2时51分，其中一座建筑外的防护网起火，火势迅速蔓延至该屋苑8座大厦中的7座。初步调查显示，维修工程中封闭窗户所用的发泡胶属高度易燃物，加上使用未达阻燃测试标准的保护网，使火势迅速蔓延至室内外。
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