<|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 are available upon request due to ethical and legal reasons. first, and foremost, the focal taxon, the new mexico ridge nosed rattlesnake, is federally listed under the endangered species act as threatened, and state listed as endangered in both arizona and new mexico. the decision to list this taxon under the esa was in large part driven by over-collecting for the pet trade. despite its listing, this relictual form still suffers from poaching. in making our data public and freely available, we necessarily divulge collection locations. this could lead to increased illegal take of this organism. secondly, rattlesnakes are particularly prone to persecution in north america, and making our data available may increase the indiscriminant killing of this federally listed species. as such, data are available upon request to scientists who wish to access them. data can be obtained by contacting the corresponding author.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>