How can we see the data in test_data.input?

[aichicaideyang]

I have some questions about the Example in the readme. It seems that the last three years of data are used for prediction. However, when splitting the test_gen, we don't know what context_length is. So, when predicting for the year 1958, should the input data be for the year 1957? Is there any way to see what the data looks like in test_data.input? The encapsulated class is too complex, and I can't see what it contains specifically.