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Find a Wikipedia image that answers this question: What shape are the blue lines on the underside of Olympic Stadium's roof?

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Represent the given Wikipedia image with related text information: Olympic stadium northern tribune.

['<|image_1|>\nRepresent the given Wikipedia image with related text information: Sochi adler aerial view 2018 23.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Barcelona Vila Olimpica.\n', "<|image_1|>\nRepresent the given Wikipedia image with related text information: Berlin World of Football  Adidas World of Football (TM) in Berlin; view from the 'Reichstag'.\n", '<|image_1|>\nRepresent the given Wikipedia image with related text information: Sochi Olympic Park Olympic Cauldron P5020328 2200 Sochi. Olympic Park. Olympic Cauldron.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Olympic snowboarding stadium.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Pyeongchang Olympic Stadium at day for 2018 Winter Paralympics opening ceremony - 4 Pyeongchang Olympic Stadium where 2018 Winter Paralympics opening ceremony is held, taken in March 9, 2018.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Estadi Olímpic Lluís Companys.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Olympic-stadium-montreal-roof-soccer-configuration-2013-03-23 Interior view of the blue roof and scoreboard of the Olympic Stadium in Montreal during a Major League Soccer (MLS) match between Montreal Impact and Red Bull New York, 23 March 2013.\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: 2016 Summer Olympics opening ceremony 1035334-olimpiadas abertura-4102 Rio de Janeiro - Cerimonia de abertura dos Jogos Olimpicos Rio 2016 no Estadio do Maracana. (Fernando Frazao/Agencia Brasil).\n', '<|image_1|>\nRepresent the given Wikipedia image with related text information: Maracana stadium, brazil - panoramio Aerial view of the Maracana Stadium.\n', "<|image_1|>\nRepresent the given Wikipedia image with related text information: Estadi Olímpic de Montjuïc - Barcelona's 1992 Olympic Stadium.\n"]
['images/WebQA/Train/30348813.jpg', 'images/WebQA/Train/30127464.jpg', 'images/WebQA/Train/30369013.jpg', 'images/WebQA/Train/30080811.jpg', 'images/WebQA/Train/30037032.jpg', 'images/WebQA/Train/30175294.jpg', 'images/WebQA/Train/30288202.jpg', 'images/WebQA/Train/30234109.jpg', 'images/WebQA/Train/30303921.jpg', 'images/WebQA/Train/30296679.jpg', 'images/WebQA/Train/30352660.jpg']