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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 data are bound by ethical and legal restrictions. to access the data of the south africa's prevention of mother to child transmission effective study, investigators that are not part of the study team should submit a concept proposal to ameena goga, md, ms (south africa medical research council (mrc), principal investigator), debra jackson (university of the western cape/unicef, principal investigator) and thu-ha dinh, md, ms (us centers for disease control and prevention (cdc), principal investigator) for approval. investigators with an approved concept proposal must apply for guest researcher status to obtain access to a workstation and the data. additionally they will need to complete data security and confidentiality training, and to sign data use and nondisclosure agreements. the data are not yet available in a stable public repository. researchers who meet criteria to access the data should contact pi ameena goga at ameena.goga@mrc.ac.za.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>