Complex sentence: For example, Portishead Radio, which was the world's busiest radiotelephony station, provided HF long-range services,; in 1974, it had 154 radio operators who handled over 20 million words per year.
Split into simpler sentences: For example, Portishead Radio, which was the world's busiest radiotelephony station, provided HF long-range services. In 1974, it had 154 radio operators who handled over 20 million words per year.