<|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: the data set used in this paper was collected from twitter. to agree with twitters terms of service, we cannot host the data on an external website. however, the data are available on request from the author (email: david.m.darmon@gmail.com).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>