Split string with multiple-character delimiter

Question

say I have the following string:

"Hello there. My name is Fred. I am 25.5 years old."

I want to split this into sentences, so that

Answer 1

>>> "Hello there. My name is Fred. I am 25.5 years old.".rstrip(".").split(". ")
['Hello there', 'My name is Fred', 'I am 25.5 years old']