I have received a tv

I was at the canteen to have my lunch, then came a "teacher" (I assumed) and start to talk with me in english. And then he said, you don't have a tv, I have one that I give to you. (How does he know?????). Well anyway he gave me this tv, isn't it great?
Now I can watch some mongolian news and wrestling and music!
Youpi, but still how did he know????