<|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: all relevant data are within the paper and its supporting information files. expression plasmids used in this study can be requested from the corresponding author at the bernhard nocht institute for tropical medicine in hamburg germany.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>