Assertion: marijuana's use | /r/HasProperty | to prevent plots of beets
Facets:
value: as a fence
type: MANNER
value: at one point in the 1980s
type: TEMPORAL
Source sentences:
text: At one point in the 1980s, the only permitted use of hemp in Germany was as a fence or hedge to prevent plots of beets being used for seed production from being contaminated by pollen from ruderal beets.