Table 1
Macro-F1 of monolingual low-resource NER (unit:%)
| Level | Method | En | Es | Avg |
|---|---|---|---|---|
| 200 | Gold-Only | 19.85/10.28 | 39.62/32.25 | 29.74/21.27 |
| MELM | 56.01/50.70 | 66.43/62.33 | 61.22/56.52 | |
| EPT* | 49.96/43.88 | 63.06/58.54 | 56.51/51.21 | |
| EPT | 56.80/51.58 | 68.92/65.12 | 62.86/58.35 | |
| 400 | Gold-Only | 47.84/41.47 | 61.45/56.69 | 54.65/49.08 |
| MELM | 54.22/48.64 | 70.76/67.18 | 62.49/57.91 | |
| EPT* | 71.68/68.28 | 69.10/65.31 | 70.39/66.80 | |
| EPT | 62.53/57.98 | 74.18/71.03 | 68.36/64.51 | |
| 600 | Gold-Only | 61.80/57.15 | 64.74/60.39 | 63.27/58.77 |
| MELM | 73.45/70.28 | 74.55/71.44 | 74.00/70.86 | |
| EPT* | 74.87/71.89 | 68.69/64.82 | 71.77/68.36 | |
| EPT | 75.30/72.38 | 75.15/72.12 | 75.23/72.25 | |
| 800 | Gold-Only | 75.73/72.84 | 67.29/63.24 | 71.51/68.04 |
| MELM | 79.74/77.32 | 73.59/70.47 | 76.67/73.90 | |
| EPT* | 80.14/77.77 | 79.79/77.33 | 79.97/77.55 | |
| EPT | 79.67/77.24 | 79.94/77.50 | 79.81/77.37 |
Note: En and Es mean English data and Spanish data. The numbers separa-ted by slashes represent macro-F1 scores with and without non-entity class, respectively. EPT initializes the weights of the embedding layers with special words, such as "location" for "B-LOC" and "I-LOC", while EPT* initializes them with random values
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