Complex sentence: Nunn also became an advocate of legalizing industrial hemp in Kentucky, writing, Frankly, I was opposed to the legalization of hemp for years because I had been of the opinion hemp was marijuana.
Split into simpler sentences: Nunn also became an advocate of legalizing industrial hemp in Kentucky. Samples, Bluegrass hemp fight has an ally "Of the issue, Nunn wrote," Frankly, I was opposed to the legalization of hemp for years because I had been of the opinion hemp was marijuana.