1.   It is a generally known fact that here our bow is at a very high tension.

2.   It is a well known fact that a negative working environment discourages creativity.

3.   It is essentially a compilation of known facts, without intrusion of personal opinions or beliefs.

4.   We can, however, give one self-consistent explanation that agrees with the known facts.

5.   A theory congruent with the known facts of the case.

6.   We must develop a strategy of management based upon the known facts.

7.   This is supposedly a well known fact in certain circles.I heard it from a segment of this circle.

8.   It is a well known fact that everyone who drinks Guinness is fond of music.

9.   It is a well known fact that designers plant a line of bollards when they do not know what to do.