The cause of the fire is not known.

The cause of the fire is not known.

The origin of the fire is unknown.

The cause of the accident is unknown.

No one knows the reason.

The cause of death is unknown.

The exact cause is unknown.

Tom's last name is unknown.

The cause of sleepwalking is not known.

The date of his birth is unknown.

The cause of the blast was not known, he said.

His parentage was unknown to us.

Smallpox was unknown to Native Americans.

The exact date of Jesus' birth is unknown.

The actual cause of death is unknown.

Nuw is New...

The two students are still missing.

Smallpox was unknown to Native Americans.

The killer's identity is still unknown.

Most English words are unknown to most English speakers.

Job insecurity back then was mostly unknown and mass poverty had disappeared.

The bill did not meet with much enthusiasm, and its fate is currently unknown.

The unexpected passing of Chucho Benítez (as he was also known) was the result of reasons that are still unknown.

In the bad bank model, the government may overpay for the bad assets, whose true value is uncertain.

The most commonly used are the hydrochloride (freebase conversion ratio 0.805), phosphate (0.736), sulphate (0.859), and citrate (0.842).

Monday's reports suggest that at least four children are dead and another eight missing.

For some time his fate was uncertain, and in the meanwhile Henry, his brother, assumed the regency.

Although the exact circumstances of five month old Umarali Nazarov's death are unknown, plenty in both countries are holding the Russian state responsible.

Sources disagree on whether there was a gasoline fire or if Parker was doused with acid from the car's battery under the floorboards.

Blues subgenres include country blues, such as Delta and Piedmont, as well as urban blues styles such as Chicago and West Coast blues.

The exact date of his marriage is not known the only certain information is that, before his exile in 1301, he had three children (Pietro, Jacopo and Antonia).

This is not to say that the economic concept of politics is utterly strange to the Chinese or, for that matter, that the religious notion of politics is unknown in the democratic West.

Through this sentence, the author was making it known to Tom and Mary that their destiny was escaping him, as he didn't understand the deep meaning of his own sentences.

At this time, the fate of dozens of residents, who were preparing to celebrate a national holiday in the coastal city of Palu, the city most damaged by the elements, remains unknown.

State owned newspaper Al Ahram insisted the assailant was unknown and that no one claimed responsibility for the bombing.

The police announced in a statement that the 25 year old mini van driver came off the road on Monday afternoon on an A road near Wiesenburg and skidded into a crash barrier. The cause of the accident is not yet known.

His date of birth is unknown, but it was probably not very long after Robert was born in 1274, and he was old enough to be fighting in 1307 and to be given an independent command not long after.