Return empty bracket [ ] when web scrapping

I try to print all the titles on nytimes.com. I used requests and beautifulsoup module. But I got empty brackets in the end. The return result is [ ]. How can I fix this problem?

import requests
from bs4 import BeautifulSoup

url = "https://www.nytimes.com/"
r = requests.get(url)
text = r.text
soup = BeautifulSoup(text, "html.parser")
title = soup.find_all("span", "balanceHeadline")
print(title)