english: And what it turned out was going on was that Facebook was looking at which links I clicked on, and it was noticing that, actually, I was clicking more on my liberal friends' links than on my conservative friends' links.
non_english: Wat er aan de hand bleek te zijn was dat Facebook bijhield op welke links ik klikte, en het merkte op dat ik meer op de links van mijn liberale vrienden klikte dan op die van mijn conservatieve vrienden.