Hang on, are you talking about "I Wish I Knew How It Would Feel To Be Free"? Because if she wrote that herself, she's going to be in for a shock when she's taken to court on an undeniable charge of plagiarism.
Not forgetting that (i) the Lighthouse Family actually had a hit with it a few years ago, and (ii) Billy Taylor's version has been the theme to "Film 72", etc since, well, 1972.