Text: Sadly, although the tree has been proved to be among the oldest in Europe, most experts believe that it is only 2,000 years old and therefore not of Hippocrates's era.
Entailment: Though there is evidence that the tree is one of the oldest in Europe, it is believed that it is not old enough to have been from Hippocrates' era.
Contradiction: There is no evidence to show that this tree is among the oldest in Europe.