Clustered
| System
| Environment
| clustering | |
| stat. social.sc. | raggruppament |
| system | |
| comp., MS | sistema |
| environment | |
| chem. | ambjent |
| |||
| raggruppament | |||
|
Clustered : 3 phrases in 2 subjects |
| Microsoft | 2 |
| Natural resourses and wildlife conservation | 1 |