The hallucinations were triggered by illnesses.
And they were triggered by drilling for oil and gas.
According to reporting by Komsomolskaya Pravda, many of the fires were triggered by lightning storms.
The failures were triggered by a few seconds of tremendous instability in energy flows.
My worries were triggered by two shocking headlines (Learning English, 13 January).
In past eras, some were triggered by thoughts of demons, possessed states and religious events.
Those riots happened in April, too, she said, and were triggered by the assassination of Dr Martin Luther King.
The protests were triggered by the planned parliamentary vote to change the constitution and allow Compaoré to rule longer.
The protests were triggered by the Ukrainian government's decision to prioritise relations with Russia over integration into the European Union.
The present troubles were triggered by the election of Mr Chaudhry, whose ancestors came from India.
As in Tunisia, the first demonstrations began in the marginalised south and were triggered by economic woes.
