Take context from the input text and decide on the accurate relationship between 'al Qaeda' and 'Osama bin Laden' from the options provided.
Options: member of, currency, chairperson, employer

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.
chairperson