diff --git a/src/lib/outputParsers/listLineOutputParser.ts b/src/lib/outputParsers/listLineOutputParser.ts
index 57a9bbc..1e2f0f5 100644
--- a/src/lib/outputParsers/listLineOutputParser.ts
+++ b/src/lib/outputParsers/listLineOutputParser.ts
@@ -22,6 +22,11 @@ class LineListOutputParser extends BaseOutputParser<string[]> {
     const regex = /^(\s*(-|\*|\d+\.\s|\d+\)\s|\u2022)\s*)+/;
     const startKeyIndex = text.indexOf(`<${this.key}>`);
     const endKeyIndex = text.indexOf(`</${this.key}>`);
+
+    if (startKeyIndex === -1 || endKeyIndex === -1) {
+      return [];
+    }
+
     const questionsStartIndex =
       startKeyIndex === -1 ? 0 : startKeyIndex + `<${this.key}>`.length;
     const questionsEndIndex = endKeyIndex === -1 ? text.length : endKeyIndex;