Complex sentence: He spent 27 years in prison, much of it in a cell on Robben Island the rest of the time he spent in Pollsmoor Prison, on convictions for crimes that included sabotage committed while he spearheaded the struggle against apartheid.
Split into simpler sentences: He spent 27 years in prison, much of it in a cell on Robben Island. The rest of his incarceration was in Pollsmoor Prison, on convictions for crimes that included sabotage committed while he spearheaded the struggle against apartheid.