Complex sentence: On September 27,2009, Abercrombie & Fitch filed a lawsuit against Beyoncé Knowles, because Beyoncé was releasing a fragrance and clothing line called "Sasha Fierce".
Split into simpler sentences: On September 27,2009, Abercrombie & Fitch filed a lawsuit against Beyoncé Knowles. A&F's reason being that Beyoncé would release a fragrance and clothing line called "Sasha Fierce".