regex - Regular expression for selecting single spaced phrases but not whitespace -


i need rather complicated regular expression select words 1 space between them , can include '-' symbol in them, should not select continuous whitespace.

'kenedy john g jr e'                  'example'                 'd-54'

i have tried following regular expression: 

\'([\s\w-]+)\'

but selects continuous whitespace don't want do.

i want expression select 

'kenedy john g jr e' 'example' 'd-54'

perhaps,

\'([\w-]+(?:\s[\w-]+)*)\'

?

edit

if leading/trailing dashes (on word boundaries) not allowed, should read:

/\'(\w+(?:[\s-]\w+)*)\'/

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