<|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: air pollution data are freely available and can be accessed from the environment canada national ambient pollution surveillance (naps) database reference [39]. daily meteorological data are freely available can be obtained from the united states national climatic data center (ncdc) reference [41]. the health administrative data we used for the study are not freely available. with a proper ethics approval, the data can be obtained by contacting one of the co-authors who now resides with an agency that provides anonymized and de-identified health administrative data to researchers: xiaoming wang, research innovation & analytics, alberta health services, 7235 2nd floor, west wing, 11402 university avenue, edmonton, alberta, canada, t6g 2j3; email: xiaoming.wang@albertahealthservices.ca; tel: (780) 407-4679; fax: (780) 407-8979.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>