i reproduced the data preprocessing

[ShayneCheng]

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I reproduced the data preprocessing, but the loss cannot be reduced, and the model could only predict "O" about entities and "No relation" about relations. The preprocessing and framework of the model have been written, and the forward propagation of the model used the source code in ipynb given by Fu. Welcome to my repository to discuss with me. https://github.com/ShayneCheng/GraphRel