有没有办法在Google Natural Language API情感分析中明确设置句子的开始和结束？

from google.cloud import language_v1

def analyze_sentiment(text):
    client = language_v1.LanguageServiceClient()

    document = language_v1.Document(content=text, type_=language_v1.Document.Type.PLAIN_TEXT)

    # 创建文本标记
    sentence1 = language_v1.TextSpan(content="这是第一句话。", begin_offset=0)
    sentence2 = language_v1.TextSpan(content="这是第二句话。", begin_offset=9)

    # 将文本标记添加到文档中
    document.text = text
    document.sentences.extend([sentence1, sentence2])

    # 分析情感
    response = client.analyze_sentiment(request={'document': document})

    # 打印情感分析结果
    for sentence in response.sentences:
        print("句子内容：", sentence.text.content)
        print("情感分数：", sentence.sentiment.score)
        print("情感极性：", sentence.sentiment.polarity)

text = "这是第一句话。这是第二句话。"
analyze_sentiment(text)