import requests
from bs4 import BeautifulSoup


def extract_text(url: str):
    if url is None or url.strip() == '':
        return ''
    response = requests.get(url)
    soup = BeautifulSoup(response.text, "html.parser")
    text = '\n\n'.join(map(lambda p: p.text, soup.find_all('p')))
    return text