>>-SUBWORD(string,n--+---------+--)----------------------------><
                     '-,length-'      

returns the substring of string that starts at the nth word, and is up to length blank-delimited words. The n must be a positive whole number. If you omit length, it defaults to the number of remaining words in string. The returned string never has leading or trailing blanks, but includes all blanks between the selected words.

SUBWORD('Now is the  time',2,2)    ->    'is the'
SUBWORD('Now is the  time',3)      ->    'the  time'
SUBWORD('Now is the  time',5)      ->    ''