Anchor: an extended voluntary negotiation period) obtain a certification confirming their public safety status from the department head responsible for system oversight.
Entailed: They got a certification that confirmed their public safety status.
Contradiction: They failed to get a certification that confirmed their public safety status.
Contradiction: The report examined how the EPA improves their internal controls. 
Contradiction: The residence is grander than Dove Cove.
Contradiction: Two women are running on the beach.
Contradiction: By carefully choosing where you want to go, you can see a lot of the country in just four weeks.