ERROR: Invalid ACE text: The word "buyer" is unknown. The word "buyer" is unknown. The word "external" is unknown. The word "employee" is unknown. The word "worker" is unknown; did you mean "worked"? The word "employee" is unknown. The word "worker" is unknown; did you mean "worked"? The word "wage-earner" is unknown. The word "wage-earner" is unknown. "Every customer is a <> buyer.": This is the first sentence that was not ACE. The sign <> indicates the position where parsing failed.