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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 main goal of the present analysis is to estimate the uncertainties of the CJK parton distributions due to the experimental errors of F γ 2 ( x , Q 2 ) data . Alike in the global CJK fit the raw experimental data are used , by which we mean that neither the radiative corrections , nor the corrections taking into the account the small off - shelness of the probed quasi - real photons are included . Further , the correlations among the measurements are neglected and in each x bin the approximation F γ 2 ( x ) ≈ F γ 2 ( x ) is assumed . Finally , one has to keep in mind that all the data were obtained with an assumption of the FFNS scheme for the heavy - quark contributions to F γ 2 ( x , Q 2 ) . The inclusion of the above corrections is beyond the scope of this work . Our work has been motivated by the recent analysis performed for the proton structure by the CTEQ Collaboration , [ 5]- [ 7 ] and the MRST group , [ 8 ] . We use the Hessian method , formulated in recent papers , to obtain sets of parton densities allowing along with the parton distributions of the best fit to calculate the best estimate and uncertainty of any observable depending on the photon structure . As the same aim can be obtained utilizing the Lagrange method , see for instance [ 5 ] , [ 8 ] and [ 9 ] , we apply this approach to obtain an independent test of the correctness of the Hessian model results .<|eot_id|><|start_header_id|>assistant<|end_header_id|>

no<|eot_id|>