Fixed multiword prediction + bug that made the code write empty predictions

combo/config.template.json

@@ -10,7 +10,7 @@
             "parameters": {
               "activation": { "type": "tanh", "parameters": {} },
               "dropout_rate": 0.25,
-              "in_features": 164,
+              "in_features": 1024,
               "out_features": 128
             }
           },
@@ -22,7 +22,7 @@
                 "type": "linear_layer",
                 "parameters": {
                   "activation": { "type": "tanh", "parameters": {} },
-                  "in_features": 164,
+                  "in_features": 1024,
                   "out_features": 512
                 }
               },
@@ -30,7 +30,7 @@
                 "type": "linear_layer",
                 "parameters": {
                   "activation": { "type": "tanh", "parameters": {} },
-                  "in_features": 164,
+                  "in_features": 1024,
                   "out_features": 512
                 }
               }
@@ -41,7 +41,7 @@
             "parameters": {
               "activation": { "type": "tanh", "parameters": {} },
               "dropout_rate": 0.25,
-              "in_features": 164,
+              "in_features": 1024,
               "out_features": 128
             }
           },
@@ -66,7 +66,7 @@
             "parameters": {
               "activation": { "type": "tanh", "parameters": {} },
               "dropout_rate": 0.25,
-              "in_features": 164,
+              "in_features": 1024,
               "out_features": 32
             }
           },
@@ -94,7 +94,7 @@
           ],
           "dropout": [0.25, 0.0],
           "hidden_dims": [128],
-          "input_dim": 164,
+          "input_dim": 1024,
           "num_layers": 2,
           "vocab_namespace": "feats_labels"
         }
@@ -123,17 +123,19 @@
         }
       },
       "seq_encoder": {
-        "type": "combo_transformer_encoder",
+        "type": "combo_encoder",
         "parameters": {
           "layer_dropout_probability": 0.33,
-          "input_dim": 164,
-          "num_layers": 2,
-          "feedforward_hidden_dim": 2048,
-          "num_attention_heads": 4,
-          "positional_encoding": null,
-          "positional_embedding_size": 512,
-          "dropout_prob": 0.1,
-          "activation": "relu"
+          "stacked_bilstm": {
+            "type": "combo_stacked_bilstm",
+            "parameters": {
+              "hidden_size": 512,
+              "input_size": 164,
+              "layer_dropout_probability": 0.33,
+              "num_layers": 2,
+              "recurrent_dropout_probability": 0.33
+            }
+          }
         }
       },
       "text_field_embedder": {
@@ -173,7 +175,7 @@
         "type": "feedforward_predictor_from_vocab",
         "parameters": {
           "vocab_namespace": "upostag_labels",
-          "input_dim": 164,
+          "input_dim": 1024,
           "num_layers": 2,
           "hidden_dims": [64],
           "activations": [
@@ -187,7 +189,7 @@
         "type": "feedforward_predictor_from_vocab",
         "parameters": {
           "vocab_namespace": "xpostag_labels",
-          "input_dim": 164,
+          "input_dim": 1024,
           "num_layers": 2,
           "hidden_dims": [64],
           "activations": [