Complex sentence: Nabeel Rajab is a nephew of Mohamed Hasan Jawad, one of the 13 political figures locked up for taking part in the uprising in 2011 and is also a cousin of Hussain Jawad, a prominent human rights activist arrested in February 2015.
Split into simpler sentences: Nabeel Rajab is a nephew of Mohamed Hasan Jawad, one of the Bahrain Thirteen who were imprisoned for taking part in the uprising in 2011. He is also a cousin of Hussain Jawad, a prominent human rights activist arrested in February 2015.