Complex sentence: It is the largest casino in Canada, and one of the biggest and best casinos in the world; for square-feet extension it has been the largest casino in the world until 2010 when it was surpassed by Gran Lisboa Macao, a new chinese casino.
Split into simpler sentences: It is the largest casino in Canada, and one of the biggest and best casinos in the world. For square-feet extension it was the largest casino in the world until 2010, when it was surpassed by Gran Lisboa Macao, a new Chinese casino.