  We explore the sensitivity of a document summary quality estimator, BLANC, to
human assessment of qualities for the same summaries. In our human evaluations,
we distinguish five summary qualities, defined by how fluent, understandable,
informative, compact, and factually correct the summary is. We make the case
for optimal BLANC parameters, at which the BLANC sensitivity to almost all of
summary qualities is about as good as the sensitivity of a human annotator.
