# Clustering: Retail [**Tobacco Advertising Study (2008 and 2011)**](https://github.com/DecodedCo/datastore/raw/master/data/Tobacco_Advertising_Study__2008_2011.csv.zip) contains data from the California Tobacco Advertising Survey (CTAS), showing the percentage and total number of stores with tobacco advertisements near candy or below three feet, in 2008 and 2011, broken down by store type. Data is originally from [**Data World**](https://data.world/chhs/tobacco-advertising-study). More information can be found there. --- # 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://datastore.decoded.com/clustering/clustering-retail.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.