Complex sentence: Wynn's proposed casino was canceled following the acquisition of Mirage Resorts by MGM Grand Inc., which, as the MGM Mirage company, proposed the Borgata casino while Trump's casino received a direct ramp from the connector.
Split into simpler sentences: Wynn's proposed casino was canceled following the acquisition of Mirage Resorts by MGM Grand Inc., which, as the MGM Mirage company, proposed the Borgata casino. Meanwhile, Trump's casino received a direct ramp from the connector.