Complex sentence: Grant became a member of the African Christian Democratic Party (ACDP) in late 1998, starting as an unpaid volunteer at the party's Western Cape provincial office until the June 1999 National General Elections.
Split into simpler sentences: Grant became a member of the African Christian Democratic Party (ACDP) in late 1998. He was a volunteer at the party's Western Cape provincial office until the June 1999 National General Elections.