With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Michael Giacchino composed the score for Dunkirk.
text_B: The Seegrotte , near Hinterbruhl , Austria , is an underground cave system with a large grotto located under a former gypsum mine .. Hinterbruhl. Hinterbruhl. Austria. Austria. grotto. grotto. gypsum. gypsum. It was closed in 1912 after the mine flooded with 20 million liters of water .. It became a tourist attraction after 1930 and has been one ever since , with the exception of World War II .. The lake is 60 meters below ground , the water surface is 6200 m ² and pumps are used to keep the waterlevel down .. Visitors can tour the old mine and take a boat ride across the underground lake .
not_related.