Text: Ele?­vators take you 100 m (328 ft) down to a sub?­ter?­ra?­nean river for a spooky boat ride past gigantic stalactites and stalagmites, formed by the calcite residue and deposits of thousands of years of persistently dripping water.
Entailment: There are stalagmites formed from thousands of years of drippings.
Contradiction: All boat rides need to avoid areas with stalactites because of the danger surrounding them.