{
    "dataset_reader": {
      "type": "conll2003",
      "tag_label": "ner",
      "token_indexers": {
        "tokens": {
          "type": "single_id",
          "lowercase_tokens": true
        },
        "elmo": {
          "type": "elmo_characters"
        }
      }
    },
    "train_data_path": "test_fixtures/data/conll2003.txt",
    "validation_data_path": "test_fixtures/data/conll2003.txt",
    "model": {
      "type": "simple_tagger",
      "text_field_embedder": {
          "token_embedders": {
              "tokens": {
                "type": "embedding",
                "embedding_dim": 50
              },
              "elmo": {
                "type": "elmo_token_embedder",
                "options_file": "test_fixtures/elmo/options.json",
                "weight_file": "test_fixtures/elmo/lm_weights.hdf5"
              }
          }
      },
      "encoder": {
              "type": "gru",
              "input_size": 82,
              "hidden_size": 25,
              "num_layers": 2,
              "dropout": 0.5,
              "bidirectional": true
      },
      "regularizer": {
        "regexes": [
          ["transitions$", {"type": "l2", "alpha": 0.01}]
        ]
      }
    },
    "data_loader": {"batch_size": 32},
    "trainer": {
      "optimizer": "adam",
      "num_epochs": 5,
      "cuda_device": -1
    }
  }