<|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: This paper is based on aggregate, publicly available data that can be accessed through links in refs. 15,16,17.   https://www.influenza.spb.ru/en/influenza_surveillance_system_in_russia/epidemic_situation/   http://cbsd.gks.ru/   https://www.influenza.spb.ru/system/epidemic_situation/situation_on_a_flu/<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>