Started adding new adrea - unfnished

src/test_databases/andrea-order-schema.tql

+define
+
+call sub relation,
+    relates caller,
+    relates callee;
+    
+person sub entity,
+    plays call:caller,
+    plays call:callee,
+    owns name,
+    owns age;
+    
+name sub attribute,
+      value string;
+age sub attribute,
+      value long;
+