Question

Can you please help us to extract word from a sentence like:

He’s led U.S. efforts for government-centered management ever since, resulting in the missions to the area.

How can we have:

He's 
led 
U.S. 
efforts 
for 
government-centered
management 
ever 
since
resulting 
in 
the  
missions 
to 
the 
area

Thank you very much in advance.

Edit and comment:

We thank all for your kind help.

Answer 1

In your case, you can split on the regex

(?:(?<![A-Z])\.|,)?(\s+|$)

This splits on whitespace, optionally preceded by a dot/comma (but on the dot only if it’s not preceded by an uppercase ASCII letter).

It will fail on edge cases like etc., so if you have a list of those, you can work them into the regex if your regex engine supports variable repetition inside lookbehinds. Which one are you using?

E. g.

(?:(?<![A-Z]|\betc|\bca|\bapprox)\.|,)?(\s+|$)

would split

He's led U.S. efforts for management, resulting in approx. 3 times the missions to the area, etc.

into

He's
led
U.S.
efforts
for
management
resulting
in
approx.
3
times
the
missions
to
the
area
etc.

Explanation:

(?:          # match either...
 (?<![A-Z]   # (as long as not preceded by A-Z
  |\betc     # or etc
  |\bca      # or ca
  |\bapprox  # or approx
 )           # ...)
 \.          # a dot
 |           # or
 ,           # a comma
)?           # if present.
(\s+|$)      # then either match whitespace or the end of the string.