sentence: A culmination point was reached in 2010 with the completion of the Burj Khalifa ( Khalifa Tower ) , now by far the world 's tallest building at 829.8 m ( 2,722 ft ) .
question: how did something culminate _ _ _ ?
answers: with the completion of the Burj Khalifa ( Khalifa Tower ) the world 's tallest building at 829.8 m ( 2,722 ft )