<|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: Due to ethical restrictions imposed by the Ethics Committee at the Ministry of Health, Republic of South Sudan, the data underlying this study are available upon request to qualified researchers. Queries related to data access may be submitted to Calistus Wilunda (calistuswilunda@yahoo.co.uk) or Giovanni Putoto (g.putoto@cuamm.org).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>