Some changes to generating p/r curves 

1) Added entity name instead of guid in some places (sentential
extraction comparison, printing of results) 
2) Augmented P/R curve with the extracted relation 
3) Added new sentential annotation files which have entity name instead
of guid 

Mapping file of guid --> entityname not checked in as it is very large.
Obtained from http://iesl.cs.umass.edu/riedel/ecml/