Text: Corporate-tax revenues took a nose dive in 1982 and 1983, regained some ground with the economic recovery, but then surged following passage of the 1986 tax reform--which deliberately raised taxes on corporations to pay for tax breaks for individuals.
Entailment: Corporate tax revenues went down a lot in 1982 and 1983.
Contradiction: Corporate tax revenues went up a lot in 1982 and 1983.