Verb conjugation of "filtern" in German

No one should eat street food in these countries, and neither I should have. It is not that I was not experienced from previous traveling, it is that I had just forgotten it and now I needed to pay for it.
I was a little confused because I recognized the voice and I had booked at Luisa's guest house. She explained me that she was sharing the phone with her neighbor and her neighbor was not honest.
On the way back I remember watching a Diego Armando Maradona movie in the car's portable DVD player. He was praised as a Saint in this movie. I took it as a good preparation of thing ahead in Buenos Aires.