Assertion: aquarium's exhibit | /r/HasProperty | billed as the world's only submarium
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Source sentences:
text: Billed as "the world's only submarium", the exhibits contain thousands of sea creatures (including seven species of shark), 2,500,000 litres (550,000 imp gal; 660,000 US gal) of water and 87 tonnes (96 short tons; 86 long tons) of salt housed in a building designed by Sir Terry Farrell and built as part of the UK National Lottery's Millennium Commission project.