Assertion: streptomycin | /r/ObjectUse | used on crop plants
Facets:
value: for 25 years
type: TEMPORAL
value: respectively
type: MANNER
value: at this point
type: TEMPORAL
Source sentences:
text: At this point, streptomycin and oxytetracycline have been used on crop plants for the past 45 years and 25 years, respectively, without reports of adverse effects on humans.