<|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 authors confirm that, for approved reasons, some access restrictions apply to the data underlying the findings. data are from the isaac phase two study centre who may be contacted via gudrun.weinmayr@uni-ulm.de. in order to obtain data, the isaac executive needs to consent on behalf of the individual study centres. the data of all centres are contained in the international dataset created and maintained by the data centre in ulm - therefore data requests can be responded to directly by the university of ulm, there is no need to contact the centres individually.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>