Complex sentence: Jaramillo joined the UP once was founded in 1985 and later in the 1988 election held the seat of Senator of the Republic while following the murder of Pardo Leal took the chair of the UP.
Split into simpler sentences: Jaramillo joined the UP once it was founded in 1985 and later in the 1988 election won the seat of Senator of the Republic. Following the murder of Pardo Leal he took the chair of the UP.