Update example scripts

examples/utils_ner.py

@@ -94,7 +94,7 @@ def convert_examples_to_features(examples,
                                  pad_on_left=False,
                                  pad_token=0,
                                  pad_token_segment_id=0,
-                                 pad_token_label_id=-1,
+                                 pad_token_label_id=-100,
                                  sequence_a_segment_id=0,
                                  mask_padding_with_zero=True):
     """ Loads a data file into a list of `InputBatch`s