CREATE TABLE table_23157997_13 (winner VARCHAR, mountains_classification VARCHAR, points_classification VARCHAR)

Who won the race with Tom Zirbel as Mountains Classification and Thomas Soladay as Points Classification?
SELECT winner FROM table_23157997_13 WHERE mountains_classification = "Tom Zirbel" AND points_classification = "Thomas Soladay"
SELECT "winner" FROM "table_23157997_13" WHERE "Thomas Soladay" = "points_classification" AND "Tom Zirbel" = "mountains_classification"