Complex sentence: Shortly after bringing Superman into animation, the Fleischers began feuding with one another; their studio slumped financially until they were forced to sell to Paramount Pictures, which ousted the Fleischers and rearranged their company as Famous Studios.
Split into simpler sentences: Shortly after bringing Superman into animation, the Fleischers began fueding with one another and their studio slumped financially until they were forced to sell to Paramount Pictures. Paramount ousted the Fleischers and rearranged their company as Famous Studios.