Revert "Remove parse" (#24)

* Revert "Remove parse"

This reverts commit 7d3caf8.

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

pygeoapi_plugins/provider/sparql.py

@@ -315,7 +315,7 @@ def _combine(self, properties, results):
             for k, v in results.items():
                 # Join query results by key
                 values = [
-                    item.get('value') if isinstance(item, dict) else item
+                    self.parse(item.get('value') if isinstance(item, dict) else item)
                     for item in (v if isinstance(v, list) else [v])
                 ]
                 # Return item or list of items
@@ -398,6 +398,23 @@ def delete(self, identifier):
     def __repr__(self):
         return f'<SPARQLProvider> {self.data}'
 
+    @staticmethod
+    def parse(value: str) -> list:
+        """
+        Parse a string by splitting it on commas.
+
+        :param value: `str` to be parsed.
+
+        :returns: A `list` of strings if commas are present,
+                  otherwise the original string.
+        """
+        if '|' in value:
+            return value.split('|')
+        elif ', ' in value:
+            return value.split(', ')
+        else:
+            return value
+
     @staticmethod
     def combine_lists(dict_data: dict):
         """