Add train, dev, and test splits (50%, 25%, 25%) with labels equally distributed

.gitattributes

@@ -57,3 +57,6 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 # Video files - compressed
 *.mp4 filter=lfs diff=lfs merge=lfs -text
 *.webm filter=lfs diff=lfs merge=lfs -text
+dev.csv filter=lfs diff=lfs merge=lfs -text
+test.csv filter=lfs diff=lfs merge=lfs -text
+train.csv filter=lfs diff=lfs merge=lfs -text

dev.csv

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d72f9a1201636729aea22a6e3357ee796053f9f3045f5ca0f64b7c2c2e42b9d8
+size 74398285

test.csv

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:28690ef4bac1c36d90d701da95f73990dbb9319f8d5a71be059c440377c343e9
+size 73121264

train.csv

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ee334deb4c84023a5d8db5ecc5be91d8e5cb010a063ab745062e0f842b355d1b
+size 147147145