Context: It was temporarily under the control of the Tibetan empire and Chinese from 650–680 and then under the control of the Umayyads in 710. The Samanid Empire, 819 to 999, restored Persian control of the region and enlarged the cities of Samarkand and Bukhara (both cities are today part of Uzbekistan) which became the cultural centers of Iran and the region was known as Khorasan. The Kara-Khanid Khanate conquered Transoxania (which corresponds approximately with modern-day Uzbekistan, Tajikistan, southern Kyrgyzstan and southwest Kazakhstan) and ruled between 999–1211. Their arrival in Transoxania signaled a definitive shift from Iranian to Turkic predominance in Central Asia, but gradually the Kara-khanids became assimilated into the Perso-Arab Muslim culture of the region.

Question: When was the region under Tibetan empire and the CHinese?
Answer: 650–680

Question: Who took control of the regin in 710?
Answer: Umayyads

Question: Who restored Persian control of the region?
Answer: The Samanid Empire,

Question: What was the name of the region when it was the cultural center of Iran?
Answer: Khorasan

Question: When was the land under Tibetan empire and Chinese?
Answer: 650–680

Question: When was Tajikistan under Ymayyads contorl?
Answer: 710

Question: Who conquered Tansaxania?
Answer: The Kara-Khanid Khanate

Question: When did the Samanid Empire rule the land?
Answer: The Samanid Empire

Question: Who restored Polish control of the region?
Answer: Unanswerable

Question: Whose arrival in Texas signaled a definite shift from Iranian to Turkic predominance? 
Answer: Unanswerable

Question: Who ruled between 1999-1211?
Answer: Unanswerable

Question: Who shrunk the cities of Samarkand and Bukhara?
Answer: Unanswerable

Question: Who was temporarily under control of the Turkish empire?
Answer: Unanswerable