Update README.md

Author: ArmaghanSarvar

README.md

@@ -1,4 +1,5 @@
 # Optimal-Classification-Tree
-Optimal classification tree creation as a mixed-integer optimization problem, implemented base on the following paper, section 2.2:
+Optimal classification tree creation solved as a mixed-integer optimization problem.
+The implementation is based on the following paper, section 2.2:
 
 https://link.springer.com/article/10.1007/s10994-017-5633-9