huge dataset update:

renamed former teachers.json into contact.json;
created new teachers.json and filled it with every teachers name, paired with its email adress and the subjects he teaches

.gitattributes

@@ -55,4 +55,5 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.webp filter=lfs diff=lfs merge=lfs -text
 # Dataset files
 questions.json filter=lfs diff=lfs merge=lfs -text
-teachers.json filter=lfs diff=lfs merge=lfs -text
+teachers.json filter=lfs diff=lfs merge=lfs -text
+contact.json filter=lfs diff=lfs merge=lfs -text

contact.json

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1527b29ff49faf772c70be164578daa47e63639789b54b4c1c4d741f1e328d19
+size 5862

questions.json

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:ff58e120703e16b9675e9eb2c99f04b253e00d80f274171a3c4e02c0fb8799f1
-size 48216
+oid sha256:d6249953fd19d08293527510277f60e063195c0b08b90a144c17a55e2500dbff
+size 48371

teachers.json

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:026b6dae7d65152ee113b2d1fc8cfb64ff1de4ff7659e9c6051be967a342b59d
-size 4806
+oid sha256:3301279b0f8d4969d493542d53473c3780654a3c2be64026922795e566547e47
+size 16953