user: Question: What series had Joan Tena in sixth place?
Columns: ['Series', 'Year', 'Winner', 'Runner-up', 'Third place', 'Fourth place', 'Fifth place', 'Sixth place', 'Host']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, '2001–2002', 'Rosa López', 'David Bisbal', 'David Bustamante', 'Chenoa', 'Manu Tenorio', 'Verónica Romero', 'Carlos Lozano']
SQL:

assistant: SELECT "Series" FROM "Table" WHERE "Sixth place" = 'Joan Tena';