We do not know for certain where the raw materials which it contains originate.

You can ask the janitor of your building if he has the container from which the material originated.

Where, for example, did the material in Saturn's rings originate?

As a result, the authorities have been unable to determine precisely where the material originated or how it was delivered to the Senate.

All materials and tools originate from supplies that are readily available locally.

The finding set off international alarm about the country's intentions, and raised questions about where the material had originated.

These involved juvenile material originating in the collapse of the eruption column.

One month later, intelligence officials are not sure where some of the six smugglers came from, where the material originated or who the customers were.

One aim was to connect raw materials originating from this area with the port of Worms.

An American laboratory analysis indicates that the material most likely originated at a Russian nuclear facility.