Any complications those women experienced remain unknown .
Fields where ownership is unknown are left blank.
The bilingual brain is still very unknown .
The true story remained unknown until 1928.
These non union directors are unknown independent directors.
It is still unknown whether bone recovers completely.
The actual crop damage estimate was unknown .
Such grand vistas must harbor unknown secrets.
What percentage has a placebo effect is unknown .
Of course surface tension was an unknown phenomenon.
It remains unknown why this name was chosen.
His total number of victims is unknown .
The exact purpose of each program is unknown .
The exact causes of migraine headaches are unknown .
Unemployment money and social security help was practically unknown .
Even the real population size is unknown .
And entirely unknown myself until this week.
The identities of those killed are unknown .