For each Author instance, the lastName should be set to the value of the last attribute on the name element.
对于每个Author实例，lastName应该设置为name元素上的last属性的值。
For each Author instance, the lastName should be set to the value of the last attribute on the name element.
对于每个Author实例，lastName应该设置为name元素上的last属性的值。
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