Complex sentence: This was, coincidentally, the location of Charles Herrold's original broadcasts, and although CBS management was unaware of San Fernando Street address' history when the move was planned, after being informed they recognized this at the bureau's opening celebration.
Split into simpler sentences: This was, coincidentally, the location of Charles Herrold's original broadcasts. While CBS management was unaware of San Fernando Street address' history when the move was planned, they quickly recognized this at the bureau's opening celebration.