<|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 authors do not own the data underlying this study. the data for three variables used in the analysis came from three different sources. first, medtrack(http://medtrack.com) provided the external technology acquisition counts for 98 pharmaceutical companies. second, compustat (www.compustat.com) provided the r&d intensity data, which was used as a proxy for absorptive capacity. lastly, wintelips (www.wintelips.com) provided the count of patent granted for each company from 1990 to 2011.<|eot_id|><|start_header_id|>assistant<|end_header_id|>

yes<|eot_id|>