Premise: The United States government has filed a civil lawsuit against BP Exploration (Alaska) Inc. (BPXA) alleging that the company "violated federal clean air and water laws" by "illegally discharging" more than 200,000 gallons crude oil during two oil spills in 2006 on Alaska's North Slope in Prudhoe Bay. BPXA previously pleaded guilty to one count of criminal negligence in illegally discharging the oil and paid US$20 million in damages. As a result of the plea, the lawsuit was filed saying that they "failed" to prepare for such a disaster by implementing "certain [sic] spill prevention measures" as the law requires.
Hypothesis: the 2 oil spills happened on 1991