<|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 available from the china national system for reporting of notifiable infectious diseases for people who meet the criteria for access to confidential data. the data underlying the findings described in the manuscript are available upon request because of legal restriction. according to the regulations of the national health and family planning commission of china, the raw data set can neither be kept in public repository nor be included as supplementary material. however, the data that is used in this study can be available upon request to the corresponding author of the paper.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>