Analyze the relationship between 'Porsche 911' and 'Porsche' within the context of the input sentence.
Options: stock exchange, parent organization, brand, director/manager

(REUTERS/Michaela Rehle) A worker inspects the new Porsche 911 GT3 RS sports car in the final check area at the Porsche factory in Stuttgart-Zuffenhausen March 10, 2015.
brand