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Average number of tokens and average Flesch-Kincaid Grade Level scores for selected samples.
| Model | Number of tokens | Flesch-Kincaid Grade Level |
| Technical abstracts | 498.11 | 14.37 |
| Gold-standard references | 269.74 | 12.77 |
| TESLEA | 131.37 | 12.34 |
| BART-UL | 145.08 | 12.66 |
| Keep it Simple | 187.59 | 13.78 |
| Multilingual unsupervised sentence simplification | 193.07 | 13.86 |
| PEGASUS-large | 272.04 | 13.93 |
| PEGASUS-pubmed-large | 150.00 | 15.09 |
