<prompt> tafsiri zifuatazo kutoka kwa swahili hadi kiingereza.brussels airlines, mnamo 1 julai 2009, lufthansa ilinunua hisa za 45 na ina azma ya kununua 55 iliyobaki mnamo 2011.  <response>: brussels airlines, on july 1, 2009 lufthansa acquired a 45 stake in the belgian airline with an option to acquire the remaining 55 in 2011. 