Complex sentence: Since 1997, he was serving with another younger half-brother Sheikh Hamdan as Deputy Prime Minister, until 2009 given the post to their young brother and half-brother Sheikh Saif and Sheikh Mansour.
Split into simpler sentences: Since 1997, he was serving with another younger half-brother Sheikh Hamdan as deputy prime minister. In 2009, he given the post to his young brother half-brother Sheikh Saif and Sheikh Mansour.