fill missing in data folder

[apkbala107]

FileNotFoundError Traceback (most recent call last)
in ()
----> 1 convert_ner_format(train_text, train_label, 'data/train.txt')
2 convert_ner_format(test_text, test_label, 'data/test.txt')
3 convert_ner_format(val_text, val_label, 'data/dev.txt')