Background sets

There are two background sets available for participants. The first background set is formed with 112728 
publications from different sources. The second background set is formed by Elsevier documents, 
with a total amount of 41760 documents, and the first background set together.
Participants using the second set will be required to accept specific use terms and conditions.
From the first background set, a total of 600 documents are randomly selected to build the test set. 
The documents that belong to the test set will be unknown to the participants until all participants have submitted their runs.