In the context of the input sentence, determine the relationship between 'al Qaeda' and 'Osama bin Laden'.
Options: developer, distribution format, founded by, location of formation

DUBAI, Aug 1 (Reuters) - A sister of former al Qaeda leader Osama bin Laden was killed along with her husband and mother when a private jet crashed in southern England on Friday, Saudi-owned al-Arabiya television reported on Saturday.
founded by