First, you need to register on CLEF website at: http://clef2018-labs-registration.dei.unipd.it/
Second, you need to join the mailing list for the Task(s) you are interested in.
First, you need to register on CLEF website at: http://clef2018-labs-registration.dei.unipd.it/
Second, you need to join the mailing list for the Task(s) you are interested in.