As Daniel Halevy reported, An almost unbelievable thing happened in the autumn of 1897.
In 1897, Daniel Halevy reported an unbelievable thing happened, but we are discovering it only now.
mnli hypothesis: In 1897, Daniel Halevy reported an unbelievable thing happened, but we are discovering it only now. premise: As Daniel Halevy reported, An almost unbelievable thing happened in the autumn of 1897.