##main files:
- pos_all.py: do POS for all relations
- usage: python pos_all.py
- run_filter.py: filter the data with POS tag for given relation
- usage: python run_filter.py relation_name correct_or_wrong
- correct_or_wrong: 0 --> correct; 1 --> wrong, (default wrong)
##method files:
- pos_rw.py: some methods for read data, write data, do POS(used for pos_all, run_filter)
- filter_rule: filter data for all relation(used for run_filter)