Assertion: nitrate | /r/HasProperty | known in scientific literature
Facets:
value: so far
type: TEMPORAL
Source sentences:
text: Nitrate itself is not acutely toxic at the levels usually attained in aquaria, at least as it is so far known in the scientific literature, but elevated levels do seem detrimental to the health of fish.
text: Nitrate itself is not particularly toxic at the levels usually attained in aquaria, at least as it is so far known in the scientific literature.