| to the development of stem cells | 10 | transitive-object |
| to that coveted ability | 8 | other |
| in human development | 6 | other |
| gene → be → key | 72 |
| gene → be → the key | 18 |
| negative | neutral | positive |
| 0.083 | 0.635 | 0.282 |
| Raw frequency | 90 |
| Normalized frequency | 0.496 |
| Modifier score | 0.600 |
| Perplexity | 81.655 |