| east africa | 0.25 |
| become popular | 0.28 |
| act as stimulant | 0.25 |
| reduce the user's motiv… | 0.16 |
| break down into the sal… | 0.16 |
| enter the bloodstream | 0.16 |
| direct causal link | 0.25 |
| a monoamine alkaloid | 0.25 |
| tannin | 0.25 |
| a lot of water | 0.16 |
| plant | 0.68 |
| green, leafy plant | 0.30 |
| grown in the arabian pe… | 0.63 |
| chewed | 0.52 |
| chewed like tobacco | 0.43 |
| wrapped in banana leaves | 0.39 |
| grown in ethiopia | 0.38 |
| used in east africa | 0.36 |
| used in yemen | 0.30 |
| easy to grow | 0.30 |
| banned | 0.28 |
| sold in bundle | 0.25 |
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