Update README.md

README.md

@@ -283,7 +283,7 @@ Introducing Distributional MIPLIB (D-MIPLIB), the first comprehensive standardiz
 ### Composition
 Distributional MIPLIB currently contains 48 MILP distributions from 13 application domains. A list of all the domains and all the distributions is provided at [website](https://sites.google.com/usc.edu/distributional-miplib). Each distribution contains a set of similar MILP optimization problem instances that correspond to the same model (a class of combinatorial optimization with specific parameters).
 
-For each distribution, there are 1000 instances in total, except for the cases when more instances have been made publicly available previously or when limited instances are available. For Neural Network Verification, there are 3692 instances in total. Maritime Inventory Routing Problem contains 118 instances. Seismic-Resilient Pipe Network Planning domain  contains 219 and 206 instances in the Easy and Hard distribution, respectively.
+For each distribution, there are 1000 instances in total, except for cases where more instances have been made publicly available previously or when limited instances are available. For Neural Network Verification, there are 3692 instances in total. Maritime Inventory Routing Problem contains 118 instances. Seismic-Resilient Pipe Network Planning domain  contains 219 and 206 instances in the Easy and Hard distribution, respectively.
 
 ### Loading MILP instances