<|begin_of_text|><|start_header_id|>system<|end_header_id|>

You are an expert at identifying data availability statements in scientific text. A data availability statement describes where research data can be found or how it can be accessed.<|eot_id|><|start_header_id|>user<|end_header_id|>

Determine if the following text contains a data availability statement. Answer with 'yes' or 'no'.

Text: The air travel data used in this study, cannot be shared publicly because of a nondisclosure agreement with the International Air Travel Association (IATA). The same data can be purchased for use by any other researcher by contacting the International Air Travel Association (IATA)- Passenger Intelligence Services (PaxIS) (https://www.iata.org/services/statistics/intelligence/paxis/Pages/index.aspx). The disease (dengue) data are available by request from the European Centre for Disease Prevention and Control (ECDC) (https://www.ecdc.europa.eu/en/publicationsdata/european-surveillance-system-tessy). All other relevant data sources are referenced in the article.    https://www.iata.org/services/statistics/intelligence/paxis/Pages/index.aspx   https://www.ecdc.europa.eu/en/publicationsdata/european-surveillance-system-tessy<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>