In 1955, the Aurora Borealis, a coating applied to crystal stones to produce a "rainbow of colors" effect was introduced.
Can we say the following?
The Aurora Borealis was discovered in 1995.

no

Moore had the monument, along with other references to God, installed in the rotunda of the Judicial Building six months after he was elected Chief Justice in 2000.
Can we say the following?
Moore had the monument installed before he became Chief Justice.

no

Three police officers have been killed by a gunman in Pittsburgh - the second mass shooting in the US in 24 hours. The officers were responding to an emergency call from the house of the gunman, named as Richard Poplawski, 23. Police said he was waiting, armed with rifles and a bulletproof vest. He shot two officers as they entered the house, and a third who tried to help them. He then traded gunfire with police for four hours before being injured and giving himself up. His friends said he had recently lost his job, and was worried that US President Barack Obama was about to ban guns.
Can we say the following?
In Pittsburgh the police killed a gunman.

no

The Independent Police Complaints Commission (IPCC) is trying to reassure lawyers for the family of Jean Charles de Menezes that the inquiry is still on track.
Can we say the following?
Police issued John Wadham's statement after lawyers for the de Menezes family met with the complaints commission, demanding more information about the killing.
no