Query: What did the person who spoke to the media at Trocadéro say China lacked?
Context: Several hundred pro-Tibet protesters gathered at the Trocadéro with banners and Tibetan flags, and remained there for a peaceful protest, never approaching the torch relay itself. Among them was Jane Birkin, who spoke to the media about the "lack of freedom of speech" in China. Also present was Thupten Gyatso, President of the French Tibetan community, who called upon pro-Tibet demonstrators to "remain calm, non-violent, peaceful".