Background is defined as "scientific background to understand the rationale and context for the study, and explain the experimental approach." Does the following text relate to "Background"? If it does not relate to Background, then return "No Label". Text: Classical rabies virus (RABV) is a neurotrophic virus, belongs to genus Lyssavirus of family Rhabdoviridae, and implicated in causing fatal and zoonotic rabies infection in mammals, including human beings (Singh et NAME_1., 2017; NAME_2 et NAME_1., 2018; NAME_2 et NAME_1., 2019). Do not include the following keywords: background, family, text, singh
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