Please answer the following question: I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "Sanskrit has also influenced Sino-Tibetan languages through the spread of Buddhist texts in translation. Buddhism was spread to China by Mahayana missionaries sent by Ashoka, mostly through translations of Buddhist Hybrid Sanskrit. Many terms were transliterated directly and added to the Chinese vocabulary. Chinese words like 剎那 chànà (Devanagari: क्षण kṣaṇa 'instantaneous period') were borrowed from Sanskrit. Many Sanskrit texts survive only in Tibetan collections of commentaries to the Buddhist teachings, the Tengyur."?
Answer:
What happened to Buddhists texts in Sino-Tibetan languages?