fix typo in readme

README.md

@@ -270,7 +270,7 @@ Recognition](http://nlp.stanford.edu/~socherr/pa4_ner.pdf) [zip](http://nlp.stan
 
 1.  [MNIST](http://yann.lecun.com/exdb/mnist/) Handwritten digits
 2.  [Google House Numbers](http://ufldl.stanford.edu/housenumbers/) from street view
-3.  [CIFAR-10 and CIFAR-100](http://www.cs.toronto.edu/~kriz/cifar.html)4.  
+3.  [CIFAR-10 and CIFAR-100](http://www.cs.toronto.edu/~kriz/cifar.html)
 4.  [IMAGENET](http://www.image-net.org/)
 5.  [Tiny Images](http://groups.csail.mit.edu/vision/TinyImages/) 80 Million tiny images6.  
 6.  [Flickr Data](http://yahoolabs.tumblr.com/post/89783581601/one-hundred-million-creative-commons-flickr-images) 100 Million Yahoo dataset