Assertion: earthworm's system | /r/HasProperty | eroded by the controversy
Facets:
value: within the world of taxonomy
type: LOCATION
value: over to classify earthworms
type: PURPOSE
value: gradually
type: MANNER
Source sentences:
text: Within the world of taxonomy, the stable 'Classical System' of Michaelsen (1900) and Stephenson (1930) was gradually eroded by the controversy over how to classify earthworms,