Sentence examples for submissions is unknown from inspiring English sources

As to whether or not this will be something that Apple formalizes into a process like it has with App Store submissions is unknown.

For 19 samples, state of submission was unknown.

Samples from these persons were submitted from Arizona, New Mexico, and North Carolina (1 sample each) and Florida and Wyoming (2 samples each); for 3 samples, state of submission was unknown.

Alexander Helios' fate is unknown.

That is unknown.

How big is unknown.

The creator is unknown.

The cause is unknown.

The author is unknown.

Data quality is unknown.

Its use is unknown.