Table 8 
Semiotic class accuracies (errors) with and without covering grammars. *: statistically significant.
 EnglishRussian
StandardKaggleStandardKaggle
PLAIN: 
 Best model 99.9% (0.10%) 99.3% (0.70%) 99.8% (0.20%) 99.1% (0.90%) 
 + CG decoding 99.9% (0.10%) 99.3% (0.70%) 99.8% (0.20%) 99.1% (0.90%) 
PUNCT: 
 Best model 99.9% (0.10%) 99.9% (0.10%) 99.9% (0.10%) 97.5% (2.50%) 
 + CG decoding 99.9% (0.10%) 99.9% (0.10%) 99.9% (0.10%) 97.6% (2.40%) 
DATE: 
 Best model 99.5% (0.50%) 98.9% (1.10%) 98.2% (1.80%) 98.3% (1.70%) 
 + CG decoding 99.5% (0.50%) 99.0% (1.00%)* 98.2% (1.80%) 98.3% (1.70%)* 
LETTERS: 
 Best model 97.5% (2.50%) 95.9% (4.10%) 98.9% (1.10%) 96.2% (3.80%) 
 + CG decoding 97.5% (2.50%) 95.9% (4.10%) 98.9% (1.10%) 96.3% (3.70%) 
CARDINAL: 
 Best model 99.4% (0.60%) 98.8% (1.20%) 97.2% (2.80%) 89.9% (10.10%) 
 + CG decoding 99.5% (0.50%) 99.1% (0.90%)* 97.1% (2.90%) 90.1% (9.90%)* 
VERBATIM: 
 Best model 99.9% (0.10%) 99.1% (0.90%) 100.0% (0.00%) 98.6% (1.40%) 
 + CG decoding 99.9% (0.10%) 99.1% (0.90%) 100.0% (0.00%) 98.6% (1.40%) 
MEASURE: 
 Best model 97.2% (2.80%) 73.3% (26.70%) 92.2% (7.80%) 89.9% (10.10%) 
 + CG decoding 97.9% (2.10%) 88.5% (11.50%)* 92.0% (8.00%) 90.1% (9.90%)* 
ORDINAL: 
 Best model 98.1% (1.90%) 98.1% (1.90%) 99.3% (0.70%) 96.9% (3.10%) 
 + CG decoding 99.0% (1.00%) 98.3% (1.70%) 99.3% (0.70%) 97.0% (3.00%) 
DECIMAL: 
 Best model 100.0% (0.00%) 98.9% (1.10%) 91.7% (8.30%) 77.6% (22.40%)* 
 + CG decoding 100.0% (0.00%) 98.9% (1.10%) 91.7% (8.30%) 76.5% (23.50%) 
ELECTRONIC: 
 Best model 63.3% (36.70%) 3.4% (96.60%) 64.6% (35.40%) 32.2% (67.80%) 
 + CG decoding 63.3% (36.70%) 3.4% (96.60%) 64.6% (35.40%) 32.2% (67.80%) 
DIGIT: 
 Best model 86.4% (13.60%) 83.1% (16.90%) 93.8% (6.20%) 99.6% (0.40%) 
 + CG decoding 86.4% (13.60%) 83.3% (16.70%) 93.8% (6.20%) 99.6% (0.40%) 
TELEPHONE: 
 Best model 94.6% (5.40%) 88.5% (11.50%) 95.5% (4.50%) 95.5% (4.50%)* 
 + CG decoding 94.6% (5.40%) 88.5% (11.50%) 95.5% (4.50%) 93.4% (6.60%) 
MONEY: 
 Best model 97.3% (2.70%) 89.8% (10.20%) 89.5% (10.50%) 77.8% (22.20%) 
 + CG decoding 97.3% (2.70%) 92.4% (7.60%)* 84.2% (15.80%) 79.9% (20.10%)* 
FRACTION: 
 Best model 81.3% (18.70%) 77.1% (22.90%) 82.6% (17.40%) 78.8% (21.20%) 
 + CG decoding 81.3% (18.70%) 77.1% (22.90%) 82.6% (17.40%) 78.8% (21.20%) 
TIME: 
 Best model 75.0% (25.00%) 90.2% (9.80%) 75.0% (25.00%) 78.8% (21.20%) 
 + CG decoding 75.0% (25.00%) 90.2% (9.80%) 75.0% (25.00%) 79.7% (20.30%) 
 EnglishRussian
StandardKaggleStandardKaggle
PLAIN: 
 Best model 99.9% (0.10%) 99.3% (0.70%) 99.8% (0.20%) 99.1% (0.90%) 
 + CG decoding 99.9% (0.10%) 99.3% (0.70%) 99.8% (0.20%) 99.1% (0.90%) 
PUNCT: 
 Best model 99.9% (0.10%) 99.9% (0.10%) 99.9% (0.10%) 97.5% (2.50%) 
 + CG decoding 99.9% (0.10%) 99.9% (0.10%) 99.9% (0.10%) 97.6% (2.40%) 
DATE: 
 Best model 99.5% (0.50%) 98.9% (1.10%) 98.2% (1.80%) 98.3% (1.70%) 
 + CG decoding 99.5% (0.50%) 99.0% (1.00%)* 98.2% (1.80%) 98.3% (1.70%)* 
LETTERS: 
 Best model 97.5% (2.50%) 95.9% (4.10%) 98.9% (1.10%) 96.2% (3.80%) 
 + CG decoding 97.5% (2.50%) 95.9% (4.10%) 98.9% (1.10%) 96.3% (3.70%) 
CARDINAL: 
 Best model 99.4% (0.60%) 98.8% (1.20%) 97.2% (2.80%) 89.9% (10.10%) 
 + CG decoding 99.5% (0.50%) 99.1% (0.90%)* 97.1% (2.90%) 90.1% (9.90%)* 
VERBATIM: 
 Best model 99.9% (0.10%) 99.1% (0.90%) 100.0% (0.00%) 98.6% (1.40%) 
 + CG decoding 99.9% (0.10%) 99.1% (0.90%) 100.0% (0.00%) 98.6% (1.40%) 
MEASURE: 
 Best model 97.2% (2.80%) 73.3% (26.70%) 92.2% (7.80%) 89.9% (10.10%) 
 + CG decoding 97.9% (2.10%) 88.5% (11.50%)* 92.0% (8.00%) 90.1% (9.90%)* 
ORDINAL: 
 Best model 98.1% (1.90%) 98.1% (1.90%) 99.3% (0.70%) 96.9% (3.10%) 
 + CG decoding 99.0% (1.00%) 98.3% (1.70%) 99.3% (0.70%) 97.0% (3.00%) 
DECIMAL: 
 Best model 100.0% (0.00%) 98.9% (1.10%) 91.7% (8.30%) 77.6% (22.40%)* 
 + CG decoding 100.0% (0.00%) 98.9% (1.10%) 91.7% (8.30%) 76.5% (23.50%) 
ELECTRONIC: 
 Best model 63.3% (36.70%) 3.4% (96.60%) 64.6% (35.40%) 32.2% (67.80%) 
 + CG decoding 63.3% (36.70%) 3.4% (96.60%) 64.6% (35.40%) 32.2% (67.80%) 
DIGIT: 
 Best model 86.4% (13.60%) 83.1% (16.90%) 93.8% (6.20%) 99.6% (0.40%) 
 + CG decoding 86.4% (13.60%) 83.3% (16.70%) 93.8% (6.20%) 99.6% (0.40%) 
TELEPHONE: 
 Best model 94.6% (5.40%) 88.5% (11.50%) 95.5% (4.50%) 95.5% (4.50%)* 
 + CG decoding 94.6% (5.40%) 88.5% (11.50%) 95.5% (4.50%) 93.4% (6.60%) 
MONEY: 
 Best model 97.3% (2.70%) 89.8% (10.20%) 89.5% (10.50%) 77.8% (22.20%) 
 + CG decoding 97.3% (2.70%) 92.4% (7.60%)* 84.2% (15.80%) 79.9% (20.10%)* 
FRACTION: 
 Best model 81.3% (18.70%) 77.1% (22.90%) 82.6% (17.40%) 78.8% (21.20%) 
 + CG decoding 81.3% (18.70%) 77.1% (22.90%) 82.6% (17.40%) 78.8% (21.20%) 
TIME: 
 Best model 75.0% (25.00%) 90.2% (9.80%) 75.0% (25.00%) 78.8% (21.20%) 
 + CG decoding 75.0% (25.00%) 90.2% (9.80%) 75.0% (25.00%) 79.7% (20.30%) 
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