Now, for a period of three years, I gathered data, not just me but also some of my friends, and I used to teach in university, so I forced my -- I mean, I asked my students to do this as well.
Saya mengumpulkan data  selama 3 tahun. Bukan hanya data saya,  tapi data kawan-kawan saya juga. Saya mengajar di universiti,  jadi saya paksa pelajar saya -- Maksud saya, saya minta pelajar saya  melakukannya juga.