《元史·本纪·卷二十七》
二十一日，淮安路盐城、山阳两县水灾，免除其租税。
壬戌，淮安路盐城、山阳县水，免其租。
On the 21st day, floods occurred in Yanzhou and Shanyang counties of Huainan Circuit, and their taxes were exempted.
<s>[INST] Kindly elucidate the central themes in this passage in English: 壬戌，淮安路盐城、山阳县水，免其租。 [/INST] On the 21st day, floods occurred in Yanzhou and Shanyang counties of Huainan Circuit, and their taxes were exempted.</s>
Kindly elucidate the central themes in this passage in English: 壬戌，淮安路盐城、山阳县水，免其租。
user
On the 21st day, floods occurred in Yanzhou and Shanyang counties of Huainan Circuit, and their taxes were exempted.
assistant