This is a traditional i-vector recipe for Speakers in the Wild.  The
 following datasets are used:

 Evaluation
     
     Speakers in the Wild    http://www.speech.sri.com/projects/sitw

 System Development
     
     VoxCeleb 1              http://www.robots.ox.ac.uk/~vgg/data/voxceleb
     VoxCeleb 2              http://www.robots.ox.ac.uk/~vgg/data/voxceleb2
     MUSAN                   http://www.openslr.org/17
     RIR_NOISES              http://www.openslr.org/28