diff --git a/src/plugin/class-subject.php b/src/plugin/class-subject.php
index 972e5a19..f944e59b 100644
--- a/src/plugin/class-subject.php
+++ b/src/plugin/class-subject.php
@@ -62,4 +62,8 @@ public function id(): int {
 	public function author_id(): int {
 		return $this->author_id;
 	}
+
+	public function transformed_post_id(): int {
+		return absint( get_post_meta( $this->id, Transformer::META_KEY_LIBERATED_OUTPUT, true ) );
+	}
 }