user: Question: What is the teaching language with the duration (years) 3.5?
Columns: ['Program', 'Degree', 'Focus', 'Teaching language', 'Duration (years)', 'full-time/part-time', 'ECTS Credit Points']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['Master in Auditing', 'Master of Science (M.Sc.)', 'Auditing', 'German', '3.5', 'part-time', 120.0]
SQL:

assistant: SELECT "Teaching language" FROM "Table" WHERE "Duration (years)" = '3.5';