We thank Maggie M. Balas for figure advice and preparation, Carol Sartorius and Jessica Finlay-Schultz for providing recent patient-derived breast cancer cell lines, Rafael Margueron for providing MS2-tethered HOTAIR cell lines used in this study, Chuan He for providing METTL3 and METTL14 expression plasmids, Patrick Hsu for providing the dCasRX plasmids, and John Rinn, Suja Jagannathan, Neelanjan Mukherjee, and Maria Aristizabal for their suggestions on the manuscript. The gene discussed is METTL3; the disease is breast cancer.