a problem to get data from *.sc files

[姚应哲]

hello,organizers:

when I use the streamcorpus python  scripts to  get data out of  *.sc files ,I come across the problem with some files  ,as follows :

Traceback (most recent call last):
  File "dump-sentences.py", line 12, in <module>
    ling=si.body.sentences["serif"]
KeyError: 'serif'

Could someone tell me what's wrong ?

Thank you for your answers !

yours ,Yingzhe