Updated readme

README.md

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 license: mit
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+### Dataset is imported from CodeXGLUE and pre-processed using their script.
+
+# Where to find in Semeru:
+The dataset can be found at /nfs/semeru/semeru_datasets/code_xglue/code-to-code/code-to-code-trans in Semeru
+
+
+# CodeXGLUE -- Code2Code Translation
+
+## Task Definition
+
+Code translation aims to migrate legacy software from one programming language in a platform toanother.
+In CodeXGLUE, given a piece of Java (C#) code, the task is to translate the code into C# (Java) version. 
+Models are evaluated by BLEU scores, accuracy (exactly match), and [CodeBLEU](https://github.com/microsoft/CodeXGLUE/blob/main/code-to-code-trans/CodeBLEU.MD) scores.
+
+## Dataset
+
+The dataset is collected from several public repos, including Lucene(http://lucene.apache.org/), POI(http://poi.apache.org/), JGit(https://github.com/eclipse/jgit/) and Antlr(https://github.com/antlr/).
+
+We collect both the Java and C# versions of the codes and find the parallel functions. After removing duplicates and functions with the empty body, we split the whole dataset into training, validation and test sets.
+
+### Data Format
+
+The dataset is in the "data" folder. Each line of the files is a function, and the suffix of the file indicates the programming language.
+
+### Data Statistics
+
+Data statistics of the dataset are shown in the below table:
+
+|       | #Examples |
+| ------- | :-------: |
+|  Train  |   10,300  |
+|  Valid  |      500   |
+|   Test  |    1,000  |