<|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** were divided into 8 strata based on institutional histology, relapse and study with strata sizes (1257,1769,107,113,223,284,84,78). In the simulation study, 720 individuals were sampled at phase 2. Based on above outcome model and the whole cohort data, the optimal phase-2 sample sizes for each stratum were n opt = (156,241,38,39,75,111,36,24).<|eot_id|><|start_header_id|>assistant<|end_header_id|>

no<|eot_id|>