Train on 680631 samples, validate on 84123 samples
Epoch 1/20
 - 1794s - loss: 5.2443 - val_loss: 4.9384
Epoch 2/20
 - 1792s - loss: 4.6713 - val_loss: 4.8187
Epoch 3/20
 - 1760s - loss: 4.5445 - val_loss: 4.7911
Epoch 4/20
 - 1765s - loss: 4.4893 - val_loss: 4.7995
Epoch 5/20
 - 1766s - loss: 4.4617 - val_loss: 4.8013
Epoch 6/20
 - 1764s - loss: 4.4483 - val_loss: 4.7873
Epoch 7/20
 - 1765s - loss: 4.4408 - val_loss: 4.8021
Epoch 8/20
 - 1772s - loss: 4.4371 - val_loss: 4.8208
Epoch 9/20
 - 1763s - loss: 4.4358 - val_loss: 4.8216
Epoch 10/20
 - 1766s - loss: 4.4385 - val_loss: 4.8369