diff --git a/3.5.-pri-request=bikes_available.md b/3.5.-pri-request=bikes_available.md
index 6dfbe1a..7010ff2 100644
--- a/3.5.-pri-request=bikes_available.md
+++ b/3.5.-pri-request=bikes_available.md
@@ -51,11 +51,11 @@
 
 **bike_group** describes at which station defined in **station_group** the bike is allowed.
 Groups are identified by ID. The following groups of bicycles are defined:
-| groupID | bike type |
+| Defined group ID's | bike type |
 | ------ | ------ |
 | 300101 | Cargobike |
 | 300103 | Citybike |
-Keep in mind, each ID is preceded by an operator-prefix.
+Keep in mind, each ID is preceded by an operator-prefix. Data type is array.
 
 
 Example