@electronic{research.microsoft.com,
   title       = {LETOR: Benchmark Dataset for Learning to Rank}, 
   url         = {http://research.microsoft.com/en-us/um/beijing/projects/letor/index.html},
   biburl      = {https://puma.uni-kassel.de/url/cdc6c62f51377005d18fab508cf78d21/benz},
   keywords    = {www2009 benchmark ranking},
   added-at    = {2011-02-04T16:08:38.000+0100},
   description = {},
   interhash   = {cdc6c62f51377005d18fab508cf78d21}, 
   intrahash   = {cdc6c62f51377005d18fab508cf78d21}
}