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C1 = 2018-08-15 23:59:59 (Suggestion Sven: 2018-09-15)
T2 = 2018-09-30 23:59:59 (Suggestion Sven: 2018-10-30)
Technical implementation
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C1 = 2018-08-15 23:59:59 (Suggestion Sven: 2018-09-15)
T2 = 2018-09-30 23:59:59 (Suggestion Sven: 2018-10-30)
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