diff --git a/demo/demo_annot.bio b/demo/demo_annot.bio
deleted file mode 100644
index cf16200fcd0436d943f71127f63894e428fafea7..0000000000000000000000000000000000000000
--- a/demo/demo_annot.bio
+++ /dev/null
@@ -1,82 +0,0 @@
-Césaire B-PER
-Alphonse I-PER
-Garon I-PER
-marraine O
-Adeline B-PER
-Dionne I-PER
-, O
-soussignés O
-Lecture O
-faite O
-Adéline O
-Dionne O
-Arsène O
-Côté O
-Arpin O
-R O
-Le O
-onze B-DAT
-aout I-DAT
-mil I-DAT
-neuf I-DAT
-cent I-DAT
-un I-DAT
-nous O
-prêtre O
-soussigné O
-avons O
-baptisé O
-Marie B-PER
-Luce I-PER
-Louise I-PER
-, O
-née O
-la B-DAT
-veille I-DAT
-, O
-fille O
-légitime O
-de O
-Carmel B-PER
-Côté I-PER
-, O
-cordonnier B-OCC
-, O
-pré O
-- O
-sent O
-, O
-déclarant O
-ne O
-savoir O
-signer O
-, O
-et O
-de O
-Eugé B-PER
-nie I-PER
-Fréchette I-PER
-, O
-de O
-cette B-LOC
-paroisse I-LOC
-. O
-Parrain O
-Napoléon B-PER
-Fréchette I-PER
-, O
-marraine O
-Adeline B-PER
-Tremblay I-PER
-, O
-soussignés O
-, O
-de O
-Ste B-LOC
-Luce I-LOC
-, O
-Lec O
-- O
-ture O
-faite O
-. O
diff --git a/demo/demo_predict.bio b/demo/demo_predict.bio
deleted file mode 100644
index 7e01c2d127aa47c95c49ab87a06e06d86f9af9b0..0000000000000000000000000000000000000000
--- a/demo/demo_predict.bio
+++ /dev/null
@@ -1,81 +0,0 @@
-Césaire B-PER
-Alphonse O
-Garon B-PER
-marraine O
-Adeline B-PER
-Dionne I-PER
-, O
-soussignés O
-Lecture O
-faite O
-Adéline O
-Dionne O
-Arsène O
-Côté O
-Arpin O
-R O
-Le O
-onze B-DAT
-aout I-DAT
-mil I-DAT
-neuf I-DAT
-cent I-DAT
-un O
-nous O
-pretre O
-soussigné O
-avons O
-baptisé O
-Marie B-PER
-Luce I-PER
-Louise I-PER
-, O
-née O
-la B-DAT
-veille I-DAT
-, O
-fille O
-légitime O
-de O
-Carmel B-PER
-Côté I-PER
-, O
-cordonnier B-OCC
-, O
-pré O
-- O
-sent O
-, O
-déclarant O
-ne O
-savoir O
-signer O
-, O
-et O
-de O
-Eugé B-PER
-nie I-PER
-Fréchette I-PER
-, O
-de O
-cette B-LOC
-paroisse I-LOC
-. O
-Parrain O
-Napoléon B-PER
-Fréchette I-PER
-, O
-marraine O
-Adéline B-PER
-Tremblay I-PER
-, O
-sousignés O
-, O
-de O
-St B-LOC
-. I-LOC
-Luce O
-, O
-Lec O
-ture O
-faite O
diff --git a/nerval/evaluate.py b/nerval/evaluate.py
index 2f0070d218c9985ac0ba336e5af4bc33143dd245..4eef4f840cf16715d0c24c4f254d6b2bd831b59f 100644
--- a/nerval/evaluate.py
+++ b/nerval/evaluate.py
@@ -624,36 +624,24 @@ def main():
     logging.basicConfig(level=logging.INFO)
 
     parser = argparse.ArgumentParser(description="Compute score of NER on predict.")
-    parser.add_argument(
-        "-m",
-        "--multiple",
-        help="Single if 1, multiple 2",
-        type=int,
-        required=True,
-    )
-    parser.add_argument(
+
+    group = parser.add_mutually_exclusive_group()
+    group.add_argument(
         "-a",
         "--annot",
         help="Annotation in BIO format.",
     )
-    parser.add_argument(
-        "-p",
-        "--predict",
-        help="Prediction in BIO format.",
-    )
-    parser.add_argument(
-        "-t",
-        "--threshold",
-        help="Set a distance threshold for the match between gold and predicted entity.",
-        default=THRESHOLD,
-        type=threshold_float_type,
-    )
-    parser.add_argument(
+    group.add_argument(
         "-c",
         "--csv",
         help="Csv with the correlation between the annotation bio files and the predict bio files",
         type=Path,
     )
+    parser.add_argument(
+        "-p",
+        "--predict",
+        help="Prediction in BIO format.",
+    )
     parser.add_argument(
         "-f",
         "--folder",
@@ -666,25 +654,32 @@ def main():
         help="Print only the recap if False",
         action="store_false",
     )
+    parser.add_argument(
+        "-t",
+        "--threshold",
+        help="Set a distance threshold for the match between gold and predicted entity.",
+        default=THRESHOLD,
+        type=threshold_float_type,
+    )
+
     args = parser.parse_args()
 
-    if args.multiple == 1 or args.multiple == 2:
-        if args.multiple == 2:
-            if not args.folder:
-                raise argparse.ArgumentError(args.folder, "-f must be given if -m is 2")
-            if not args.csv:
-                raise argparse.ArgumentError(args.folder, "-c must be given if -m is 2")
-            if args.folder and args.csv:
-                run_multiple(args.csv, args.folder, args.threshold, args.verbose)
-        if args.multiple == 1:
-            if not args.annot:
-                raise argparse.ArgumentError(args.folder, "-a must be given if -m is 1")
-            if not args.predict:
-                raise argparse.ArgumentError(args.folder, "-p must be given if -m is 1")
-            if args.annot and args.predict:
-                run(args.annot, args.predict, args.threshold, args.verbose)
+    if args.annot:
+        if not args.predict:
+            raise argparse.ArgumentError(
+                args.folder, "You need to specify the path to a predict file"
+            )
+        if args.annot and args.predict:
+            run(args.annot, args.predict, args.threshold, args.verbose)
+    elif args.csv:
+        if not args.csv:
+            raise argparse.ArgumentError(
+                args.folder, "You need to specify the path to a folder of bio files"
+            )
+        if args.folder and args.csv:
+            run_multiple(args.csv, args.folder, args.threshold, args.verbose)
     else:
-        raise argparse.ArgumentTypeError("Value has to be 1 or 2")
+        raise Exception("You need to specify the argument of input file")
 
 
 if __name__ == "__main__":