Assertion: otter | /r/HasProperty | an indicator species
Facets:
Source sentences:
text: As the top predator in England's rivers and lakes, the BBC reports, otters are an indicator species whose health reveals much about the well-being of the entire aquatic ecosystem.
text: As the top predator in England's rivers and lakes, the BBC reports, otters are an indicator species whose health reveals much about the well-being of the entire aquatic ecosystem.