import re

pattern = r"\b\d{1,3}\. .*?(?=\b\d{1,3}\. |$)"
s = "134. Lorem Ipsum is simply dummy text of the printing and typesetting industry 135. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book 136. It has survived not only five centuries"

print(re.findall(pattern, s))