diff --git a/src/main/java/org/gcube/informationsystem/model/entity/resource/cidoc/D14_Software.java b/src/main/java/org/gcube/informationsystem/model/entity/resource/cidoc/D14_Software.java
index 5b15537..9327073 100644
--- a/src/main/java/org/gcube/informationsystem/model/entity/resource/cidoc/D14_Software.java
+++ b/src/main/java/org/gcube/informationsystem/model/entity/resource/cidoc/D14_Software.java
@@ -4,7 +4,6 @@ import org.gcube.informationsystem.model.entity.resource.Software;
 
 /**
  * @author Luca Frosini (ISTI - CNR)
- * TODO check if can be removed
  */
 public interface D14_Software extends D1_Digital_Object, Software {
 
diff --git a/src/main/java/org/gcube/informationsystem/model/entity/resource/cidoc/E21_Person.java b/src/main/java/org/gcube/informationsystem/model/entity/resource/cidoc/E21_Person.java
new file mode 100644
index 0000000..6ba92bf
--- /dev/null
+++ b/src/main/java/org/gcube/informationsystem/model/entity/resource/cidoc/E21_Person.java
@@ -0,0 +1,8 @@
+package org.gcube.informationsystem.model.entity.resource.cidoc;
+
+/**
+ * @author Luca Frosini (ISTI - CNR)
+ */
+public interface E21_Person extends E39_Actor {
+	
+}
diff --git a/src/main/java/org/gcube/informationsystem/model/entity/resource/cidoc/E40_Legal_Body.java b/src/main/java/org/gcube/informationsystem/model/entity/resource/cidoc/E40_Legal_Body.java
index b92155a..8b53370 100644
--- a/src/main/java/org/gcube/informationsystem/model/entity/resource/cidoc/E40_Legal_Body.java
+++ b/src/main/java/org/gcube/informationsystem/model/entity/resource/cidoc/E40_Legal_Body.java
@@ -5,6 +5,6 @@ import org.gcube.informationsystem.model.entity.resource.LegalBody;
 /**
  * @author Luca Frosini (ISTI - CNR)
  */
-public interface E40_Legal_Body extends E39_Actor, LegalBody {
+public interface E40_Legal_Body extends E74_Team, LegalBody {
 
 }
diff --git a/src/main/java/org/gcube/informationsystem/model/entity/resource/cidoc/E74_Team.java b/src/main/java/org/gcube/informationsystem/model/entity/resource/cidoc/E74_Team.java
new file mode 100644
index 0000000..1c31b5d
--- /dev/null
+++ b/src/main/java/org/gcube/informationsystem/model/entity/resource/cidoc/E74_Team.java
@@ -0,0 +1,9 @@
+package org.gcube.informationsystem.model.entity.resource.cidoc;
+
+/**
+ * @author Luca Frosini (ISTI - CNR)
+ * aka E74_Group in CIDOC Conceptual Reference Model version 6.2.2
+ */
+public interface E74_Team extends E39_Actor {
+	
+}