select people from people where CityID =(select CityID from S_City where CityName like '%北京%') and goupId=(select goupId from goup where goupName like '%专家%')
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select people from people where CityID =(select CityID from S_City where CityName like '%北京%') and goupId=(select goupId from goup where goupName like '%专家%')
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