Question: Where is the headquarters of the company that unveiled a 2-in-1 convertible tablet at the 2013 IFA in Berlin, Germany?
Sentence (from "Lenovo"): Lenovo Group Ltd. or Lenovo PC International or shortened as Lenovo ( ; formerly stylized as lenovo) is a Chinese multinational technology company with headquarters in Beijing, China and Morrisville, North Carolina.
Relevant evidence: Yes