How he returned to life is unknown at this time.

The cause of his death is unknown at this time.

Their long term effect on the human body is unknown at this time.

Whether the film will go on without him or not is unknown at this point.

It is unknown at this time if the plan will still be put into effect.

It is unknown at this point in time if the line will continue with study process.

The status of the group is unknown at this point.

It is unknown at this time if any new products are in production.

Special features on the second season is unknown at present.

He was an unknown at the time of his election in 2010.