Complex sentence: On 21 July 2011, Libyan opposition sources claimed that Senussi was killed in an attack by armed rebels in Tripoli; however, a few hours later the same sources recanted on their earlier claim and some even said he might have just been injured.
Split into simpler sentences: On 21 July 2011, Libyan opposition sources claimed that Senussi was killed in an attack by armed rebels in Tripoli. However, a few hours later the same sources recanted on their earlier claim and some even said he might have just been injured.