You are using the "File Labelling" tool.
Upload your set of document to classify.
File to curate
or
try with this set of articles (Muscle classification example):

Shuffle items within the file ?
Help Box.
Please upload a file containing the list of articles or other entities to manually curate.
The file must be formatted as follows: 
 Pubmed_id 	Title	Article
 Pubmed_id2	Title2	Article2
...
or 
 Gene_ontology_id      Term1   Description1
 Gene_ontology_id2     Term2   Description2
...
Each entry must be "tab" separated.
The identifiers in the first column must be numeric only.

Guidelines (optional)