Ignore the comparator element

Bert to Bert pre-release

Merge pull request jayded#12 from jayded/update_annotations

ensure that all end offsets are below max-len

Merge pull request jayded#10 from jayded/remove_wrong_offsets

remove offsets that are wrong

Merge pull request jayded#9 from jayded/fix_corrupted_file

update corrupted file to have correct text info

Fix evidence span offsets. Small code improvements.

NAACL 2019 Code