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#lang brag
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txtadv-program : [verb-section] [everywhere-section] [things-section] [places-section] start-section
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verb-section : /"===VERBS===" verb-item+
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/verb-item : verb-list s-exp
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@verb-list : verb [/"," verb-list]
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/verb : ID ["_"]
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everywhere-section : /"===EVERYWHERE===" id-desc*
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things-section : /"===THINGS===" thing-item+
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/thing-item : DASHED-NAME id-desc+
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places-section : /"===PLACES===" place-item+
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/place-item : DASHED-NAME STRING place-items id-desc+
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/place-items : /"[" [place-list] /"]"
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@place-list : ID [/"," place-list]
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start-section : /"===START===" ID
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/id-desc : ID s-exp
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@s-exp : ID | STRING | nested-s-exp
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/nested-s-exp : /"(" s-exp* /")"
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