How many persons did the writer go to the zoo with?

Last week my parents, sister, brother and I went to the zoo. We went there for recreation. We left at 6.00 a.m. and arrived (here at 8.00 a.m. It is about a hundred kilometers to go to the zoo from my house. There were a lot of people watching a giant snake. The snake was there for about a week. It was 9 meters long. I thought it was the biggest snake I had ever seen. After going around and watching various animals, we went home. On the way home, we stopped at the Borobudur temple for half an hour.