Text: The Cro-Magnon shelter (Abri de Cro-Magnon) on the north side of town is the spot where, in 1868, railway workers uncovered three 30,000-year-old human skel?­e?­tons beside their flint and bone tools.
Entailment: In 1868 three human skeletons dating back several thousands of years were found by the railway workers.
Contradiction: Railway workers found the remains of thirty human skeletons in 1868.