Complex sentence: Today this former Air Force Base is still used as a civil airport, yet for such a huge facility (the longest runway is 9,900' long) it is all but abandoned, as only 11 aircraft are still based on the field.
Split into simpler sentences: Today this former Air Force Base is still used as a civil airport, yet for such a huge facility (the longest runway is 9,900' long). It is all but abandoned, as only 11 aircraft are still based on the field.