Die Schwalbe
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COMMENTDATE%3E%3D20200919 AND NOT K%3D%27Hilfsr%C3%BCckz%C3%BCger%27 AND A%3D%27Ernst%2C Manfred%27 AND S%3D%27The Problemist%27 AND NOT A%3D%27Kupper%2C Josef%27 AND NOT COOKED AND CPLUS AND S%3D%27The Problemist%27
atomic expression must have form 'field = value' [COMMENTDATE % $$NUMBER0 E % $$NUMBER1 D20200919]