diff --git a/src/caoscrawler/semantic_target.py b/src/caoscrawler/semantic_target.py
index 3c8112e0afe14cabc30c2f5f31bbf55015e7dd98..2396446f1f46f7b73bea71c44185d1fa5b695b1b 100644
--- a/src/caoscrawler/semantic_target.py
+++ b/src/caoscrawler/semantic_target.py
@@ -97,8 +97,7 @@ class SemanticTarget():
     are updated according to the reference map.
 
     This model should only be manipulated via three functions:
-    - make_identifiable: adds an identifiable to a SemanticEntity what possibly allows to merge it
-                         with another SemanticEntity
+    - make_identifiable: adds an identifiable to a SemanticEntity
     - merge_with_equivalent: check whether there is an equivalent SemanticEntity and merge into
                              that if one is found
     - check_remote_server: uses the identifiable to check the remote server and add ID and path if
@@ -143,15 +142,14 @@ class SemanticTarget():
         self._mark_entities_with_path_or_id()
 
     def make_identifiable(self, se: SemanticEntity):
-        """ creates an identifiable for the given SemanticEntity and possibly merges it into an
-        equivalent SemanticEntity
+        """Create an identifiable for the given SemanticEntity and store it there.
         """
         if se.identifiable is not None:
             raise RuntimeError("Already has identifiable")
         se.identifiable = self.identifiableAdapter.get_identifiable(
             se, self.backward_id_referenced_by[se.uuid])
 
-    def merge_with_equivalent(self, se: SemanticEntity):
+    def merge_with_equivalent(self, se: SemanticEntity) -> bool:
         equivalent_se = self.get_checked_equivalent(se)
         if equivalent_se is None:
             return False
@@ -159,14 +157,14 @@ class SemanticTarget():
             self._merge_into(se, equivalent_se)
             return True
 
-    def check_remote_server(self, se: SemanticEntity):
+    def check_remote_server(self, se: SemanticEntity) -> None:
         identified_record = (
             self.identifiableAdapter.retrieve_identified_record_for_identifiable(
                 se.identifiable))
         if identified_record is not None:
             se.identify_with(identified_record)
 
-    def set_missing(self, se: SemanticEntity):
+    def set_missing(self, se: SemanticEntity) -> None:
         """ add the given SemanticEntity to the list of missing entities
 
         This removes the SemanticEntity from the unchecked list and implies that the entity does
@@ -208,27 +206,27 @@ class SemanticTarget():
                 self._identifiable_look_up):
             return self._identifiable_look_up[entity.identifiable.get_representation()]
 
-    def get_equivalent_existing(self, se):
-        """ Check whether this Record exists on the remote server
+    # def get_equivalent_existing(self, se):
+    #     """ Check whether this Record exists on the remote server
 
-        Returns: The stored Record
-        """
-        treated = self.get_any(se)
-        if id(treated) in self._existing:
-            return rec
-        else:
-            return None
+    #     Returns: The stored Record
+    #     """
+    #     treated = self.get_any(se)
+    #     if id(treated) in self._existing:
+    #         return rec
+    #     else:
+    #         return None
 
-    def get_equivalent_missing(self, se):
-        """ Check whether this Record is missing on the remote server
+    # def get_equivalent_missing(self, se):
+    #     """ Check whether this Record is missing on the remote server
 
-        Returns: The stored Record
-        """
-        treated = self.get_any(record, identifiable)
-        if id(treated) in self._missing:
-            return rec
-        else:
-            return None
+    #     Returns: The stored Record
+    #     """
+    #     treated = self.get_any(record, identifiable)
+    #     if id(treated) in self._missing:
+    #         return rec
+    #     else:
+    #         return None
 
     def combine_fragments(self):
         for se in self.se:
@@ -473,13 +471,19 @@ class SemanticTarget():
                 if referenced in self.unchecked:
                     if referenced in circle:
                         closed = True
-                    circle.append(pval)
+                    circle.append(pval)  # FIXME
                     added_to_circle = True
             if not added_to_circle:
                 return None
         return circle
 
     def _add_any(self, entity: SemanticEntity, lookup):
+        """Add ``entity`` to this SemanticTarget and store in ``lookup`` cache.
+
+The entity is stored in the SemanticEntity's ``id``, ``path`` and ``identifiable`` lookup tables, if
+the respective attributes exist.
+
+"""
         if entity.id is not None:
             self._id_look_up[entity.id] = entity
         if entity.path is not None:
@@ -489,7 +493,7 @@ class SemanticTarget():
         lookup[id(entity)] = entity
 
     def _merge_into(self, source: SemanticEntity, target: SemanticEntity):
-        """ tries to merge record into newrecord
+        """ FIXME tries to merge record into newrecord
 
         If it fails, record is added to the try_to_merge_later list.
         In any case, references are bent to the newrecord object.