One challenge is having enough training data. Another is that the training data needs to be free of contamination. For a model trained up till 1900, there needs to be no information from after 1900 that leaks into the data. Some metadata might have that kind of leakage. While it’s not possible to have zero leakage - there’s a shadow of the future on past data because what we store is a function of what we care about - it’s possible to have a very low level of leakage, sufficient for this to be interesting.
Houses on the street have sandbags outside permanently because of the continued risk of flooding
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有几次，他帮小姐“买钟”后，刚走到夜总会门口，小姐突然谎称身体不舒服，又跑回去赚下一拨客人的钱了。叫妈咪出来理论，妈咪和小姐串通一气。最让他气愤的是，有个妈咪天天打电话到家里骚扰他的家人。朱老板形容后来的小姐既缺钱，也缺感情，经济好了，品格却在降低。，更多细节参见搜狗输入法下载
reader/sorter machine connected by serial channel to an IBM 1401 computer.