user: Question: What stage (winner) has Quick Step as the team classification, and Trent Lowe as the young rider classification?
Columns: ['Stage (Winner)', 'General Classification', 'Points Classification', 'Mountains Classification', 'Young Rider Classification', 'Team Classification']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['0 Prologue (ITT) ( Thor Hushovd )', 'Thor Hushovd', 'Thor Hushovd', 'no award', 'Andriy Hryvko', 'Crédit Agricole']
SQL:

assistant: SELECT "Stage (Winner)" FROM "Table" WHERE "Team Classification" = 'Quick Step' AND "Young Rider Classification" = 'Trent Lowe';