Capital words between words – Regex

I am trying to find capital words occurring between words using Regex. I want to ignore capital words after.?! and starting of paragraph.

Currently using the code below to find capital letters

[A-Z][^\s]*

Example 

A sentence containing Capital letters. How to Extract only capital letters?

The Regex should find only Capital and Extract ignoring How and A

>Solution :

One possible solution, find all patterns, but use capturing group only on pattern you want to match (regex101):

import re

pat = re.compile(r"^\s*[A-Z]+|[.?!]\s*[A-Z]+|([A-Z]\S*)")


text = "A sentence containing Capital letters. How to Extract only capital letters?"

for m in pat.findall(text):
    if m:
        print(m)

Prints:

Capital
Extract