Python 有没有办法打印使用re.search（）找到的整个句子？

我需要一种方法来打印找到匹配的整个句子，如果可能的话，打印整个段落。

类似于

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因为你只匹配项目单词，所以你可以选择“否”，句子什么时候开始，什么时候结束

import re
import requests

# a function to clean all HTML tags and attributes (def Clean_HTML(raw_html))
# returns clean_text
site_URL = input("\n Enter a site URL:")
request_site= requests.get(site_URL)
raw_html = request_site.text
text = Clean_HTML(raw_html)

LIST = [""]
x = input("\n enter the number of words to search for:")
for i in range(int(x)):
    LIST.append(input("\n input a word please:")

for item in LIST:
    match = re.search(r"("item")",clean_text)
    print (match)

with open('text.txt') as f:
  lines = f.readlines()

search = "Nulla"
for line in lines:
  if search in line:
    print(line)