'Returns the sr-only text for overall score on the progress chart,
and the complete text for overall score (including the same sr-text).'

def graph_overall_score(self):

    selector = self.q(css='#grade-detail-graph    .overallGrade')[0]
    label = selector.find_elements_by_class_name('sr')[0]
    return [label.text, selector.text]
