<|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: We attempted to validate our models in independent cohorts but were limited by a lack of publicly available cohorts with all the molecular features and relevant clinical data on previous ipilimumab therapy and biopsy timing used in our integrated model . In a limited validation , we tested predictive models incorporating individual features where data were available in an independent validation cohort 44 ( Methods ) , and found concordant predictions of primary resistance with low MHC - II HLA expression in ipilimumab - treated tumors and higher heterogeneity in ipilimumabnaive tumors ( Extended Data Fig . 10 ) , although neither of these predictors was significant in this small cohort ( empiric P = 0.21 and P = 0.066 , respectively ; Methods ) .<|eot_id|><|start_header_id|>assistant<|end_header_id|>

no<|eot_id|>