# Data built as follows:

git clone https://github.com/yuchenlin/OntoNotes-5.0-NER-BIO
cd OntoNotes-5.0-NER-BIO/
python3 agg.py

for s in train dev test; do
    cut -f 1,4 onto.${s}* | cat -s | tail -n +2 \
        | perl -pe 's/^-LRB-/\(/; s/^-RRB-/\)/' > $s.tsv
done