Many old instances misclassified as bridging are definite NPs without further modification and common noun heads without a string match to a previous mention.
the isSameHead feature (table 12: f 13) checks whether antecedent candidates have the same head as the anaphor: this is rarely the case in bridging (except in some cases of set bridging and spatial/temporal sequence, see Example (30)) and can therefore be used to exclude antecedent candidates.