Nancy Wilson and Heart   I have no problem with your editit is as accurate as mine  My problem was with the previous version which asserted that she and her sister were merely a part which while technically accurate dramatically underplays their pivotal role  Your edit is better than mine but not because of what you appear to perceive as inaccuracy but rather because of the ambiguity of mine  When I said formed you appear to think I meant definition  or   And you are correct in saying that would not be correct  But for the record I was using the word with definition  in mind which is accurate  Well leave your wording in place which eliminates the ambiguity