Traceback (most recent call last):


 "tools/anntoconll.py", line 14, in <module>

from sentencesplit import sentencebreaks_to_newlines


 "/home/ubuntu/brat/tools/sentencesplit.py", line 12, in <module>

from ssplit import regex_sentence_boundary_gen
ImportError: No module named 'ssplit'

Traceback (most recent call last):


 "/usr/bin/pip", line 9, in <module>

from pip import main
ImportError: cannot import name main
