def evaluate_data(evaluation_data, grant_tagger):
    """
    Predict evaluation data using grant_tagger and return the accuracy score.
    """
    X_vect_eval = grant_tagger.transform(evaluation_data)
    y_eval = evaluation_data["Relevance code"].tolist()
    eval_scores = grant_tagger.evaluate(X_vect_eval, y_eval)

    return eval_scores['accuracy']