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So I'm training a sequence-labeling model with a BiLSTM-CRF architecture, and I am getting negative values on Viterbi Loss. Is this possible?

I'm using the following formula in my code, as specified from this tutorial: $$ \begin{equation} L = \log({\textstyle \sum_{t \in T}} e^{\text{score(t)}})-\text{score}(t_G) \end{equation} $$ I used this as is, without getting its absolute value.

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