Translation of left-hander in German

In addition, two woman were singing songs taken from Vietnamese theater. Again, I don't exactly recall what it was all about, but it seems boring and unimportant from today's point of view.
We joined the mass and climbed it. The stones were a little slippery and I doubt that this place is accident free. Climbing big slippery stones was not an easy task but we managed it slowly.
At noon we continued to the Altiplano to visit some lakes and volcanoes. At 4000 meter above see level it became suddenly extremely cold and our heads started to spin. Altitude sickness?