Text: It's still being debated whether 123 suffocated and 23 survived or  only  43 died, leaving 21 survivors, but however many died, they were enough impetus for Clive to crush Siraj-ud-daula at the Battle of Plassey.
Entailment: It is being debated the numbers of people who dies and survived.
Contradiction: The debate is over on the numbers of perished versus those alive.