<|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: atomic coordinates and structure factors for the alkd2 crystal structure are available from the rcsb protein data bank (accession number 4x8q). all other data are within the paper and its supporting information files.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>