<|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: avian survey data from 2006 to 2011 are available from the ornithological atlas of venice municipality (bon and stival, 2013). data on bird species presence and abundance recorded at the two case study airports (i.e. venice marco polo, vce and treviso antonio canova, tsf), as well as air traffic and birdstrike data are available upon request to the airport management authority, save s.p.a. whose director airport operations, massimiliano dosi, and safety manager, adriano andreon, may be contacted at the following e-mail addresses: mdosi@veniceairport.it and aandreon@veniceairport.it.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>