After that, consecutive words being predicted as positive class by the classifier of the same type are treated as an entity.
for sequence s = {w 1 , w 2 , w 3 , w 4 , w 5 }, if its predicted labels by the classifier of a given type are L = {1, 1, 0, 0, 1}, then we treat {w 1 , w 2 } and {w 5 } as two entities of the type.