<|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: yield data of rice, wheat and maize and the related planted area from 1980 to 2008 were collected from agricultural yearbook of each county (published annually by the china agriculture press in beijing), china statistical yearbook (19802008). details for obtaining publicly available data are included as supporting information.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>