Simplify the following text for a Grade 3 native English-speaking person.
Original: After the death of Shaykh Ahmad , leadership was passed on to Sayyid KÃ zim of Rasht ( 1793 â `` 1843 ) .
Simplified: Shaykh Ahmad lived was born in 1753 and he died in 1862 . Siyyid KÃ zim was born in 1793 and he died in 1843 .