<|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: data from the enns survey are available from the 'unité de surveillance et depidémiologie nutritionnelle (usen), institut de veille sanitaire - université paris 13' institutional data access for researchers who meet the criteria for access to confidential data. information from nhanes is made available by the centers for disease control and prevention through an extensive series of publications and articles in scientific and technical journals. for data users and researchers throughout the world, survey data are available on the internet (http://www.cdc.gov/nchs/nhanes/nhanes_questionnaires.htm) and on easy-to-use cd-roms.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>