SignalCode: RuntimeSignalCode | | "invalid-name" | "expected-predicate" | "expected-symbol" | "operator-requires-one-operand" | "postfix-operator-requires-one-operand" | "prefix-operator-requires-one-operand" | "unbalanced-symbols" | "expected-argument" | "unexpected-command" | "cyclic-definition" | "invalid-supersets" | "expected-supersets" | "unknown-domain" | "duplicate-wikidata" | "invalid-dictionary-entry" | "syntax-error"