Casualty - 1986 Closure 1-15 is rated/received certificates
of:
UK:12
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Closure - 2011 II was released on:
USA: 1 January 2011
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Bo Banger - 2013 Attempting Closure 1-3 was released on:
USA: 1 November 2013
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The Battle of Hogwarts - 2011 Closure 1-5 was released on:
USA: 19 July 2011
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The main difference between Kaleen closure and positive closure
is; the positive closure does not contains the null, but Kaleen
closure can contain the null.