In SRL task, the distribution of the role labels is similarly uneven and the problem comes worse after we introduce the additional <VR> node and None label, directly applying the primitive form of bilinear attention would fail to capture the prior probability P (y i = c k ) for each class.
semantic role labeling (sRL) is a shallow semantic parsing, which is dedicated to identifying the semantic arguments of a predicate and labeling them with their semantic roles.