《隋书·帝纪·卷一》
开皇七年正月十八日，高祖在太庙祭祀。
七年春正月癸巳，有事于太庙。
On January 18 of the seventh year of the Kaihuang era, Emperor Gaozu held a sacrificial rite in the Imperial Ancestral Temple.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 七年春正月癸巳，有事于太庙。 [/INST] On January 18 of the seventh year of the Kaihuang era, Emperor Gaozu held a sacrificial rite in the Imperial Ancestral Temple.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 七年春正月癸巳，有事于太庙。
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On January 18 of the seventh year of the Kaihuang era, Emperor Gaozu held a sacrificial rite in the Imperial Ancestral Temple.
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