<prompt> Translate the following text to EnglishTimu kubwa za kitaalamu zinamilikiwa na milki kubwa za uchapishaji au minyororo ya maduka makubwa, kila mmoja akichanganya jina la kampuni yao na majina ya utani ya Amerika ya wakati, maarufu zaidi kuwa Yomiuri Giants.  <response>: The major professional teams are owned by the biggest publishing empires or department store chains, each combining their company name with the time-honored American nicknames, the most famous being the Yomiuri Giants. 