<|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: the authors do not own the data. all relevant data are available form the united network for organ sharing (unos). interested researchers may request access to the star file, which contains information on all transplants performed since 1987, via the online form (http://optn.transplant.hrsa.gov/converge/data/request_main.asp).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>