Anchor: Employer entity contributions to pension and other retirement benefit plans for Federal employees.
Entailed: Employer contributions to pensions and other retirement benefits for federal employees. 
Contradiction: No one contributes to retirement pensions for federal employees, they don't have one. 
Contradiction: A man standing in a crowd of people.
Contradiction: The beach is crowded with people.
Contradiction: The young girl is laughing at her dress.
Contradiction: Four kids going on an adventure in a canoe.