<|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 simplest possibility for the dark energy component is cosmological constant Λ or equivalently vacuum energy [6]. In the past, a nonzero cosmological constant has been advocated and then with the improved observational **data** discarded several times [7]. Due to this checked history and the difficulty in understanding the observed Λ in the framework of modern quantum field theory, now most physicists and astronomers prefer other candidates for dark energy, including a frustrated network of topological defects such as strings or walls [8] and an evolving scalar field referred to by some as quintessence [9] etc. As shown in literatures, it is difficult to discriminate against these different possibilities either by the SNeIa **data** alone [10] or only by the CMBR **data** [11]. This led some authors to consider the combination of the SNeIa measurements with the anisotropy of CMBR [12] or the large scale structures [13].<|eot_id|><|start_header_id|>assistant<|end_header_id|>

no<|eot_id|>