Die Schwalbe

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COMMENTDATE>=20200919 AND NOT K='Hilfsrückzüger' AND NOT S='Chess is an Art: Games, Notes, Problems, Drawings' AND S='L'Unita'
atomic expression must have form 'field = value' [( COMMENTDATE >= $$NUMBER0 AND NOT K = $$STRING1 AND NOT S = $$STRING2 AND S = $$STRING3 UNITA $$STRING4]