Complex sentence: While López Rivera does not deny of confirm his affiliation with the FALN, and disowns any personal involvement in the bombing deaths, the FALN was involved in more than 100 bombings in New York, Chicago and other cities.
Split into simpler sentences: While López Rivera does not deny of confirm his affiliation with the FALN, he disowns any personal involvement in the bombing deaths. However, the FALN was involved in more than 100 bombings in New York, Chicago and other cities.