Complex sentence: The film's climax was filmed around the area of the Union Station train depot, the large gas tank, which stood over three hundred feet, was made available to the cast and crew by the Southern California Gas Company.
Split into simpler sentences: The film's climax was filmed around the area of the Union Station train depot. The large gas tank, which stood over 300 feet tall, was made available to the cast and crew by the Southern California Gas Company.