Complex sentence: Cuban exile Sergio Archaca Smith was the head the New Orleans chapter of the FRD and, in December 1960, he opened an office in the Balter Building at 403 Camp Street, Room 207.
Split into simpler sentences: Cuban exile Sergio Archaca Smith was the head the New Orleans chapter of the FRD. Beginning in December 1960, Archaca Smith maintained an office in the Balter Building at 403 Camp Street, Room 207.