Add info about predict mode

README.md

@@ -306,6 +306,27 @@ use BERT for any single-sentence or sentence-pair classification task.
 Note: You might see a message `Running train on CPU`. This really just means
 that it's running on something other than a Cloud TPU, which includes a GPU.
 
+#### Prediction from classifier
+Once you have trained your classifier you can use it in inference mode by using the --do_predict=true command.
+You need to have a file named predict.tsv in the input folder. 
+Output will be created in file called predict_results.tsv in the output folder.
+Each line will contain output for each sample, columns are the class probabilities.
+```shell
+export BERT_BASE_DIR=/path/to/bert/uncased_L-12_H-768_A-12
+export GLUE_DIR=/path/to/glue
+export TRAINED_CLASSIFIER=/path/to/fine/tuned/classifier
+
+python run_classifier.py \
+  --task_name=MRPC \
+  --do_predict=true \
+  --data_dir=$GLUE_DIR/MRPC \
+  --vocab_file=$BERT_BASE_DIR/vocab.txt \
+  --bert_config_file=$BERT_BASE_DIR/bert_config.json \
+  --init_checkpoint=$TRAINED_CLASSIFIER \
+  --max_seq_length=128 \
+  --output_dir=/tmp/mrpc_output/
+```
+
 ### SQuAD
 
 The Stanford Question Answering Dataset (SQuAD) is a popular question answering