You are using the "Compare files" tool.
This tool allows you to compare classifications between annotators and to create "gold standard" datasets.

File to compare
add a file to compare
File 1:

you can compare these two sets of abstracts classified by 2 different methods by a biocurator.

Help Box.
This tool allows you to compare files tagged by one or several annotators.
Some statistics about the labelling are provided. You can evaluate an inter-annotator agreement based on article tags, time to classify, size of articles ...
You can also merged files between annotators to compute a "Gold Standard" from labelled files.
Tips :
You can add files to analyze by clicking on the link "add a file to compare".