diff --git a/daten/stundenplan-bachelor.json b/daten/stundenplan-bachelor.json
index d04ec56..369b9a0 100644
--- a/daten/stundenplan-bachelor.json
+++ b/daten/stundenplan-bachelor.json
@@ -158,7 +158,7 @@
 						"de": "Wahlveranstaltungen",
 						"en": "Elective events"
 					},
-					"room": "verschiedene",
+					"room": "Verschiedene Räume",
 					"notes": [3]
 				},
 				{
@@ -252,7 +252,7 @@
 						"de": "Prüfung",
 						"en": "Exam"
 					},
-					"room": "verschiedene"
+					"room": "Verschiedene Räume"
 				},
 				{
 					"category": "kleingruppe",
@@ -272,10 +272,10 @@
 						"de": "Workshops (Slots 1-3)",
 						"en": "Workshops (slots 1-3)"
 					},
-					"room": "verschiedene"
+					"room": "Verschiedene Räume"
 				},
 				{
-					"category": "zentral",
+					"category": "optional",
 					"from": "19:00",
 					"to": "21:00",
 					"name": {