Assertion: glass eel | /r/CapableOf | overcome various natural challenges
Facets:
value: sometimes
type: TEMPORAL
value: by piling up their bodies
type: MANNER
Source sentences:
text: Once they recruit to coastal areas, they migrate up rivers and streams, overcoming various natural challenges — sometimes by piling up their bodies by the tens of thousands to climb over obstacles — and they reach even the smallest of creeks.