<|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: all the soil and environmental data used in this study comes from the national soil database of denmark, which prohibits the authors from making the minimal data set publicly available. however, readers may contact mogens h. greve (mogensh.greve@agrsci.dk) at the department of agro-ecology, aarhus university, denmark, or mette balslev greve (agro@au.dk) at the national soil database of denmark to request the data.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>