# Delete expression
If you would like to delete your training data for a single expression you can do so by selecting an expression you want to delete and clicking on the 
“trash can” icon. When asked, confirm your action by clicking “Yes, delete expression” in the pop up.
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# Agent Instructions: Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
GET https://emotiv.gitbook.io/emotivbci/facial-expressions/delete-expression.md?ask=
```
The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.