Who was Mountains Classification in the race with Nick Frey as Youth Classification and Tom Zirbel as Points Classification?
CREATE TABLE table_23157997_13 (mountains_classification VARCHAR, youth_classification VARCHAR, points_classification VARCHAR)
SELECT mountains_classification FROM table_23157997_13 WHERE youth_classification = "Nick Frey" AND points_classification = "Tom Zirbel"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_23157997_13 (mountains_classification VARCHAR, youth_classification VARCHAR, points_classification VARCHAR) Question: Who was Mountains Classification in the race with Nick Frey as Youth Classification and Tom Zirbel as Points Classification? [/INST] SELECT mountains_classification FROM table_23157997_13 WHERE youth_classification = "Nick Frey" AND points_classification = "Tom Zirbel" </s>