《宋史·本纪·卷十六》
这个月，青州临胸、益都石变为面。
是月，青州临朐、益都石化为面。
This month, the stones near Linxiong in Qingzhou turned into flour.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 是月，青州临朐、益都石化为面。 [/INST] This month, the stones near Linxiong in Qingzhou turned into flour.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 是月，青州临朐、益都石化为面。
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This month, the stones near Linxiong in Qingzhou turned into flour.
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