With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Arizona is currently the most important producer of turquoise by value. Several mines exist in the state, two of them famous for their unique colour and quality and considered the best in the industry: the Sleeping Beauty Mine in Globe ceased turquoise mining in August 2012. The mine chose to send all ore to the crusher and to concentrate on copper production due to the rising price of copper on the world market. Since the mine closed, the price of it's own turquoise in its natural state has seen a significant increase. The Kingman Mine as of 2015 still operates alongside a copper mine outside of the city. Other mines include the Blue Bird mine, Castle Dome, and Ithaca Peak, but they are mostly inactive due to the high cost of operations and federal regulations. The Phelps Dodge Lavender Pit mine at Bisbee ceased operations in 1974 and never had a turquoise contractor. All Bisbee turquoise was "lunch pail" mined. It came out of the copper ore mine in miners' lunch pails. Morenci and Turquoise Peak are either inactive or depleted.
text_B: From the way that this passage is worded, could you conclude that the closure of the Sleeping Beauty mine led to a significant enough decrease in supply of turquoise that the price for the stone increased overall?
NO.