We talk to Singapore's leading documentary filmmaker, director Tan Pin Pin. Her body of work includes her best-known film, the beloved Singapore Gaga and Moving House, recognized with a Student Oscar. She shares how she crafts her films, sometimes taking up to a year in the editing stage, and the secret to her films - intense research into her subjects before any interview begins. She's currently working on a film about Singapore's education system, called "Unteachable"