The demonstrations do not appear to be politically motivated, but were more a spontaneous event, residents said.

Assassination is not a spontaneous event, but a trail of action that can lead to discovery.

Organization Us members maintained the meeting was a spontaneous event.

It seems to be gazing into a space designed less to generate than to contain spontaneous social events.

Those lunches were private, noncommercial and spontaneous events about which perhaps too much has been written.

But there was nothing in the records about a spontaneous event like this.

Despite its post-revolutionary mythology, the march was not a spontaneous event.

Ladies and gentlemen, this was probably the most spontaneous event in the history of television.

The origin of life was long viewed as a spontaneous event.

But how does one go about proving the spontaneous event?