Task: Question Answering
Input (English): Passage: Historians disagree on what the relationship was between the Ming court and Tibet and whether or not Ming China had sovereignty over Tibet. Van Praag writes that Chinese court historians viewed Tibet as an independent foreign tributary and had little interest in Tibet besides a lama-patron relationship. The historian Tsepon W. D. Shakabpa supports van Praag's position. However, Wang Jiawei and Nyima Gyaincain state that these assertions by van Praag and Shakabpa are "fallacies". Question: Who supported van Praag's beliefs? 
Output (English): historian Tsepon W. D. Shakabpa