diff --git a/src/caoscrawler/identifiable_adapters.py b/src/caoscrawler/identifiable_adapters.py
index 653951f404f2ccbd71f6ff998e6713a4f449dade..7a27dfeb6df8128ab825924b26279aff8df4f442 100644
--- a/src/caoscrawler/identifiable_adapters.py
+++ b/src/caoscrawler/identifiable_adapters.py
@@ -42,7 +42,7 @@ def convert_value(value):
 
     Parameters
     ----------
-    value : The property of which the value shall be returned.
+    value : the value that shall be returned and potentially converted.
 
     Returns
     -------
@@ -54,11 +54,13 @@ def convert_value(value):
         return str(value.id)
     elif isinstance(value, datetime):
         return value.isoformat()
-    elif type(value) == str:
+    elif isinstance(value, bool):
+        return str(value).upper()
+    elif isinstance(value, str):
         # replace single quotes, otherwise they may break the queries
         return value.replace("\'", "\\'")
     else:
-        return f"{value}"
+        return str(value).strip()
 
 
 class IdentifiableAdapter(metaclass=ABCMeta):
@@ -97,7 +99,7 @@ class IdentifiableAdapter(metaclass=ABCMeta):
         whether the required record already exists.
         """
 
-        query_string = "FIND Record "
+        query_string = "FIND RECORD "
         if ident.record_type is not None:
             query_string += ident.record_type
         for ref in ident.backrefs:
diff --git a/unittests/test_identifiable_adapters.py b/unittests/test_identifiable_adapters.py
index 6817b9e6993c0ec509354b68ff60d9a9caf534ae..c9c9e86aee5dbebf12a83dcaa26eef2f9668bca5 100644
--- a/unittests/test_identifiable_adapters.py
+++ b/unittests/test_identifiable_adapters.py
@@ -50,9 +50,9 @@ def test_create_query_for_identifiable():
             "h": db.Record(id=1111),
             "i": db.File(id=1112),
             "j": [2222, db.Record(id=3333)]}))
-    assert (query.lower() == "find record b with name='a' and 'c'='c' and 'd'='5' and 'e'='5.5'"
-            " and 'f'='2020-10-10t00:00:00' and 'g'='true' and 'h'='1111' and 'i'='1112' and "
-            "'j'='2222' and 'j'='3333' ")
+    assert (query == "FIND RECORD B WITH name='A' AND 'c'='c' AND 'd'='5' AND 'e'='5.5'"
+            " AND 'f'='2020-10-10T00:00:00' AND 'g'='TRUE' AND 'h'='1111' AND 'i'='1112' AND "
+            "'j'='2222' AND 'j'='3333' ")
 
     # The name can be the only identifiable
     query = IdentifiableAdapter.create_query_for_identifiable(
@@ -71,6 +71,13 @@ def test_create_query_for_identifiable():
     assert query.lower() == ("find record person which is referenced by 14433 and which is "
                              "referenced by 333 and with 'last_name'='b' ")
 
+    # With single quote in string
+    query = IdentifiableAdapter.create_query_for_identifiable(
+        Identifiable(record_type="Person", backrefs=[], properties={'last_name': "B'Or"}))
+    print("find record person which is referenced by 14433 and which is "
+          "referenced by 333 and with 'last_name'='B\\'Or' ")
+    assert query == ("FIND RECORD Person WITH 'last_name'='B\\'Or' ")
+
 
 def test_load_from_yaml_file():
     ident = CaosDBIdentifiableAdapter()