With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: 28 Days (film) was unable to cast Dominic West.
text_B: The 1720 Chinese expedition to Tibet or the Chinese conquest of Tibet in 1720 was a military expedition sent by the Qing dynasty to expel the invading forces of the Dzungar Khanate from Tibet and establish a Chinese protectorate over the country .. Tibet. Tibet. Dzungar Khanate. Dzungar Khanate. Qing dynasty. Qing dynasty. protectorate. protectorate. The expedition occupied Lhasa and marked the beginning of Qing rule in Tibet , which lasted until the dynasty 's fall in 1912 .. Tibet. Tibet. Lhasa. Lhasa. Qing rule in Tibet. Tibet under Qing rule
not_related.