What key details about john johnstone -lrb- footballer -rrb- can be extracted from the following bio? Bio: john arthur johnstone was an english footballer who made six league appearances as a forward for port vale in 1921 and 1922 . he was the brother of fellow vale player harry johnstone .
The answer to this question is:
- caps is 6- position is forward- totalcaps is 6- fullname is john arthur johnstone- name is john johnstone- totalgoals is 0- birth place is manchester , england- goals is 0