<|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: data are from professor javier ortega at universidad autonoma de madrid, spain. future researchers interested by this data must contact professor javier ortega at the following address: javier.ortega@uam.es and julian fierrez at the following address: julian.fierrez@uam.es, in order to retrieve and sign a "non disclosure agreement" (nda), as we did.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>