Count the coverage using the constructed embedding.
Count the coverage using the constructed embedding.

We are going to try various alternatives in the embedding::lookup_word,
so we cannot use precomputed counts to compute the coverage.

ufal/parsito,ufal/parsito,ufal/parsito,ufal/parsito,ufal/parsito,ufal/parsito,ufal/parsito,ufal/parsito