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How do you evaluate a conversation?
What to measure when there is no reference to compare against
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Curating training data with SQL, not annotators
Buying entity density cheaply, before you spend the labelling budget
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Why word error rate is the wrong target
Two systems with the same WER can differ completely in usefulness
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Probabilistic Matrix Factorization
Scalable solution for large, sparse, and imbalanced data
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Variational Calculus
A brief introduction