I'm having some trouble understanding the changes made to the coref resolver in the last version of the Stanford NLP tools. As an example, below is a sentence and the corresponding CorefChainAnnotation:
The atom is a basic unit of matter, it consists of a dense central nucleus surrounded by a cloud of negatively charged electrons.
{1=[1 1, 1 2], 5=[1 3], 7=[1 4], 9=[1 5]}
I am not sure I understand the meaning of these numbers. Looking at the source doesn't really help either.
Thank you