 
 <translate> I got a question for you: The Willis Tower, built as and still commonly referred to as the Sears Tower, is a 110-story, 1,450-foot (442.1 m) skyscraper in Chicago, Illinois. At completion in 1973, it surpassed the World Trade Center towers in New York to become the tallest building in the world, a title it held for nearly 25 years; it remained the tallest building in the Western Hemisphere until the completion of a new building at the World Trade Center site in 2014. The building is considered a seminal achievement for its designer Fazlur Rahman Khan. The Willis Tower is the second-tallest building in the United States and the Western hemisphere -- and the 16th-tallest in the world. More than one million people visit its observation deck each year, making it one of Chicago's most-popular tourist destinations. The structure was renamed in 2009 by the Willis Group as part of its lease on a portion of the tower's space.

Based on this passage, what is the name of the old sears tower in chicago?
Let's think first: <hau> Ina da wata tambaya a gare ku: Hasumiyar Willis, da aka gina kuma har yanzu ana kiranta Hasumiyar Sears, ita ce katafaren gini mai hawa 110, mai tsawon kafa 1,450 (mita 442.1) a Chicago, Illinois. Lokacin da aka kammala shi a 1973, ya zarce hasumiyoyin Cibiyar Ciniki ta Duniya a New York don zama gini mafi tsayi a duniya, taken da ya riƙe kusan shekaru 25; ya kasance mafi tsayi a ginin Yammacin Yankin Yamma har zuwa lokacin da aka kammala sabon gini a shafin Cibiyar Ciniki ta Duniya a shekarar 2014. Ana ɗaukar ginin a matsayin babban nasara ga mai tsara shi Fazlur Rahman Khan. Hasumiyar Willis ita ce gini ta biyu mafi tsayi a Amurka da kuma Yammacin duniya - kuma ta 16 mafi tsayi a duniya. Fiye da mutane miliyan ɗaya ne suke ziyartar wurin kallon ta kowace shekara, hakan ya sa ta zama ɗaya daga cikin wuraren da yawon buɗe ido suka fi shahara a Chicago. An sake sunan ginin a cikin 2009 ta Willis Group a matsayin wani ɓangare na haya a kan wani ɓangare na sararin samaniya.  Bisa ga wannan nassi, menene sunan tsohuwar hasumiyar Sears a Chicago? Bari mu fara tunani: 