An unsatisfiable formula is:
A similar system is already being used by South Cambridgeshire District Council which in the last 12 months has identified 1,000 additional claims for residents.
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Electricity pricing
（一）违反国家规定，未经注册登记，以社会团体、基金会、社会服务机构等社会组织名义进行活动，被取缔后，仍进行活动的；