• Ϟσϧ: Transformer [Vaswani+’17] • ධՁ: ࣗಈධՁई (17छ) • Word and utterance entropy [Serban+’17] • KL divergence • Embedding metrics (average, extrema, greedy) • Coherence • Distinct • BLEU 2019-09-28 ୈ11ճ࠷ઌNLPษڧձ Entropy-based training data filtering (proposed) vs (base) Ϋϥελߟྀ