PERSON@1 was the founder and chief executive officer of ORGANIZATION@1 , a fast-food restaurant chain specializing in hamburgers .

PERSON@2 `` PERSON@3 -LRB- July NUMBER@1 , NUMBER@2 -- January NUMBER@3 , NUMBER@4 -RRB- was the founder of PERSON@4 's Old Fashioned Hamburgers , and was its chief executive officer -LRB- CEO -RRB- .
