Mistake in the input of structured_energy. 

https://github.com/dhruvdcoder/structured_prediction_baselines/blob/8134512b1765198a79be6b4d82d6bc496da42b30/structured_prediction_baselines/modules/structured_energy/structured_energy.py#L32

I think we need to pass `x` instead of `y` in the input to forward. The energy does not need two sets of y values. It might need x or it might not but it does not need y. 