Complex sentence: The first stage F shed was opened by the Western Australia Premier David Brand in December 1960 between then and the opening of the second stage G shed in May 1962 over 250,000 passengers had already passed through the terminal.
Split into simpler sentences: The first stage F shed was opened by the Western Australia Premier David Brand in December 1960. Between then and the opening of the second stage G shed in May 1962 over 250,000 passengers passed through the terminal.