Given the ambiguity, the safest approach is to explain that the query is unclear and ask for more details. But since the user is asking for a feature, maybe I can create a hypothetical feature based on possible interpretations. For example, if it's a historical patent, a feature could be about the innovative aspects of the patent. If it's a PDF document, maybe features like enhanced searchability or interactive elements in version 18. However, making educated guesses without concrete info could lead to inaccuracies.