Question: Which trademark of an American athletic company has been estimated to have a worth of 26 billion dollars?

The Swoosh is the logo of American athletic shoe and clothing manufacturer Nike, Inc. Today, it has become one of the most recognizable brand logos in the world, and the most profitable, having a worth of $26 billion alone. <SEP> The Great Flood of 1913 occurred between March 23 and March 26, after major rivers in the central and eastern United States flooded from runoff and several days of heavy rain.  Related deaths and damage in the United States were widespread and extensive.  While the exact number is not certain, flood-related deaths in Ohio, Indiana, and eleven other states are estimated at approximately 650.  The official death toll range for Ohio falls between 422 and 470.  Flood-related death estimates in Indiana range from 100 to 200.  More than a quarter million people were left homeless.  The death toll from the flood of 1913 places it second to the Johnstown Flood of 1889 as one of the deadliest floods in the United States.  The flood remains Ohio's largest weather disaster.  In the Midwest damage estimates exceeded a third of a billion dollars.  Damage from the Great Dayton Flood at Dayton, Ohio, exceeded $73 million.  Indiana’s damages were estimated at $25 million (in 1913 dollars).  Further south, along the Mississippi River, damages exceeded $200 million.  Devastation from the flood of 1913 and later floods along the Mississippi River eventually changed the country's management of its waterways and increased federal support for comprehensive flood prevention and funding for flood control projects.  The Ohio Conservancy Act, which was signed by the governor of Ohio in 1914, became a model for other states to follow.  The act allowed for the establishment of conservancy districts with the authority to implement flood control projects. <SEP> Just Do It (stylized as JUST DO IT.)  is a trademark of shoe company Nike, and one of the core components of Nike's brand.  The slogan was coined in 1988 at an advertising agency meeting.  The founder of Wieden+Kennedy agency, Dan Wieden credits the inspiration for his "Just Do It" Nike slogan to Gary Gilmore’s last words: "Let's do it."  The "Just Do It" campaign allowed Nike to further increase its share of the North American domestic sport-shoe business from 18% to 43%, (from $877 million to $9.2 billion in worldwide sales) from 1988 to 1998.  In many Nike-related situations, "Just Do It" appears alongside the Nike logo, known as the Swoosh. <SEP> IKEA ( or ; ] ) is a multinational group, headquartered in the Netherlands, that designs and sells "," kitchen appliances and home accessories.  It has been the world's largest furniture retailer since at least 2008.  It was founded in Sweden in 1943 by then-17-year-old Ingvar Kamprad, who was listed by "Forbes" Magazine in 2015 as one of the ten richest people in the world, worth more than 40 billion dollars.  The company's name is an acronym that consists of the initials of Ingvar Kamprad (name of founder), Elmtaryd (the farm where he grew up), and Agunnaryd (his hometown in Småland, southern Sweden).  The company is known for its modernist designs for various types of appliances and furniture, and its interior design work is often associated with an eco-friendly simplicity.  In addition, the firm is known for its attention to cost control, operational details, and continuous product development, corporate attributes that allowed IKEA to lower its prices by an average of two to three percent over the decade to 2010 during a period of global expansion.  The IKEA group has a complex corporate structure, which the European Union has alleged was designed to avoid over 1 billion Euros in tax payments over the 2009-2014 period.  It is controlled by several foundations based in the Netherlands, Luxembourg and Liechtenstein.