The presence of a rival can also trigger attachment and jealousy.

However, in some cases, the mere presence of the factor can trigger the effect.

Her presence outside the cell must have triggered the alarm.

There is some evidence to suggest that the presence of violent objects such as a gun can trigger aggression.

However, her presence triggers a gang shooting, and Evelyn is shot in the leg.

The presence of a monastery at Torri triggered economic growth in the area.

But your presence might well trigger the response we all fear.

If we're going to let this thing run its course, perhaps my presence will trigger another moment of, at least near, lucidity.

The presence of the timber company triggered rapid economic growth.

It was someone who was 204 supposed to be there, whose presence wouldn't trigger any reaction.