def METHOD_NAME():
    sentence = 'I am happy'
    tokens = ['i', 'am', 'happy']
    assert tokens == QAMetrics._get_normalized_tokens(sentence)
    sentence = 'I am a person'
    tokens = ['i', 'am', 'person']
    assert tokens == QAMetrics._get_normalized_tokens(sentence)
    sentence = 'I am a person.'
    tokens = ['i', 'am', 'person']
    assert tokens == QAMetrics._get_normalized_tokens(sentence)