Doctors who treated Ayrton Senna after he crashed during the San Marino Grand Prix have denied allegations that the Brazilian driver died at the Imola track.
Can we say the following?
Ayrton Senna had the accident that caused his death at the San Marino Grand Prix.

yes

The dam covering what used to be its football pitch fill up with millions of tons of poisonous mining waste.
Can we say the following?
Mine waste-water poses an environmental hazard.

no

Iraq became a sovereign country Monday morning, but only a dozen officials were present at the transfer of power ceremony in the heavily guarded Green Zone of Baghdad. Bremer handed over legal documents that were accepted by Iraq's interim Prime Minister Iyad Allawi.
Can we say the following?
The transfer of power took place in Baghdad.

yes

France is to compensate people who suffered health problems as a result of three decades of nuclear weapons tests, its government says. It was time to investigate health complaints reported by staff who took part in tests, Defence Minister Herve Morin said. Mr Morin told Le Figaro France should be "true to its conscience". France carried out more than 200 tests, firstly in Algeria and later in French Polynesia, between 1966 and 1996. Mr Morin said about 150,000 civil and military workers were "theoretically affected" by the tests. Mr Morin said an independent commission would examine claims on a case-by-case basis. He added that 10m euros ($13.6m; 9.3m) had already been earmarked to compensate victims.
Can we say the following?
France carried out more than 200 nuclear tests during 30 years.
yes