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 31 or 32.  And you are correct in saying that would not be correct.  But for the record, I was using the word with definition 33 in mind, which is accurate.  We'll leave your wording in place, which eliminates the ambiguity. 98.82.21.92