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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _get_site_amplification_term(self, C, vs30):
 """ Returns the site amplification term on the basis of Eurocode 8 site class """

        s_b, s_c, s_d = self._get_site_dummy_variables(vs30)
        return (C["sB"] * s_b) + (C["sC"] * s_c) + (C["sD"] * s_d)