Sentence examples for Not been known from inspiring English sources

But that history has not been known".

However, its clinical role and pathogenicity has not been known.

And it is certainly not been known for them, particularly.

Amazon has not been known for its friendliness to unions.

Columbia has not been known for its athletics".

So far, Piazza has not been known for both.

Until now the singer has not been known for reflection.

It is clearly pre-earthquake, but its exact timing has not been known until now.

But the basis of the prognostic differences between the two groups has not been known.

The physical mechanism responsible for their glow has not been known.

But its activity on cartilage protection has not been known yet.