Text: Our work at IRS was done at the Wage and Investment Division in IRS' headquarters in Washington, D.C., and at the Accounts Management, Submissions Processing, and Compliance branches at the Ogden, UT, Service Center.
Entailment: The two different departments we worked with in the IRS were located in Utah and in Washington, D.C.
Contradiction: We did not do any work at the IRS.