github:https://github.com/JackKuo666/AllenNLP_notes/tree/master/2.A_Walk_Through_AllenNLP
1.simple_tagger.json
1.1 train
allennlp train 1.simple_tagger.json -s ./tmp/simple_tagger
1.2 evaluation
allennlp evaluate ./tmp/simple_tagger/model.tar.gz ./data/sentences.small.dev
1.3 prediction
allennlp evaluate ./tmp/simple_tagger/model.tar.gz ./input.txt