Complex sentence: On 4 June 2015, it was announced that the Bjarke Ingels Group had been chosen to design Two World Trade Center, one of the towers replacing the Twin Towers, which had initially been entrusted to the British firm Foster and Partners.
Split into simpler sentences: On 4 June 2015, it was announced that the Bjarke Ingels Group had been chosen to design Two World Trade Center, one of the towers replacing the Twin Towers. The work had initially been entrusted to the British firm Foster and Partners.