diff --git a/pyproject.toml b/pyproject.toml
index 0807a5f..823f6c1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "smashed"
-version = "0.21.5"
+version = "0.21.6"
 description = """\
 SMASHED is a toolkit designed to apply transformations to samples in \
 datasets, such as fields extraction, tokenization, prompting, batching, \
diff --git a/src/smashed/mappers/promptsource.py b/src/smashed/mappers/promptsource.py
index 0a77f04..65a57fe 100644
--- a/src/smashed/mappers/promptsource.py
+++ b/src/smashed/mappers/promptsource.py
@@ -141,16 +141,33 @@ def approx_input_fields(self) -> Tuple[Set[str], ...]:
         are used, nor cases where members of a variable are accessed.
         """
 
-        # we compute variables first because some might
-        all_variables = set(
-            field
-            for field in self.get_vars_from_txt(self.template)
-            if field not in self.extra_vars
-        )
-        return tuple(
-            {v for v in all_variables if v in fragment}
-            for fragment in self.template.split("|||")
+        output = tuple(
+            set(
+                field
+                for field in self.get_vars_from_txt(t)
+                if field not in self.extra_vars
+            )
+            for t in self.template.split("|||")
         )
+        print(output)
+
+        return output
+
+        # # we compute variables first because some might
+        # all_variables = set(
+        #     field
+        #     for field in self.get_vars_from_txt(self.template)
+        #     if field not in self.extra_vars
+        # )
+        # out = tuple(
+        #     {
+        #         field
+        #         for field in all_variables
+        #         if (field in fragment and field not in self.extra_vars)
+        #     }
+        #     for fragment in self.template.split("|||")
+        # )
+        # return out
 
     @property
     def template_text(self) -> Tuple[str, ...]: