Original sentence: 1974, died August 05, 2009) was a leading militant in Waziristan, Pakistan and the leader of the Taliban umbrella group, Tehrik-i-Taliban Pakistan, formed in December 2007
Edited sentence: 1974, possibly died August 05, 2009) was, or is, a leading militant in Waziristan, Pakistan and the leader of the Taliban umbrella group, Tehrik-i-Taliban Pakistan, formed in December 2007