A computer system failure closed down share trading at the Tokyo Stock Exchange for most of yesterday, the worst disruption to date for Asia's largest bourse.
Can we say the following?
The Tokyo Stock Exchange was closed down by computer system failure.

yes


Neil Armstrong was an aviator in the Navy and was chosen with the second group of astronauts in 1962. Made seven flights in the X-15 program (1960 photo), reaching an altitude of 207,500 feet. Was backup command pilot for Gemini 5, command pilot for Gemini 8, backup command pilot for Gemini 11, backup commander for Apollo 8, and commander for Apollo 11: successfully completing the first moonwalk.
Can we say the following?
Neil Armstrong was the first man who landed on the Moon.

yes


A powerful bomb, hidden in a truck, exploded outside the headquarters of Colombia's secret police, Wednesday, causing severe damage, Bogota mayor Andres Pastrana said.
Can we say the following?
An attempt on Andres Pastrana's life was carried out using a powerful bomb.

no


He also developed a breath test that could detect sulfur compounds emitted from the H. pylori.
Can we say the following?
The H. pylori produces sulphur compounds.


yes