| in order to undertake this research | 7 | purpose |
| to interrelate them | 5 | purpose |
| for purification | 4 | purpose |
| mind → be → necessary | 52 |
| mind → be → required | 12 |
| mind → be → must | 4 |
| mind → be → prerequisite | 3 |
| negative | neutral | positive |
| 0.131 | 0.667 | 0.202 |
| Raw frequency | 71 |
| Normalized frequency | 0.523 |
| Modifier score | 0.429 |
| Perplexity | 280.321 |