Complex sentence: Besides writing letters and telegrams to raise awareness of the Palestinian plight, the PAWC also engaged in prisoner advocacy, attempting to reduce the length of harsh sentences by appealing to the British authorities and raising money to support families who had lost their breadwinners to imprisonment.
Split into simpler sentences: Besides writing letters and telegrams to raise awareness of the Palestinian plight, the PAWC also engaged in prisoner advocacy. This involved the attempt to shorten harsh prison sentences by appealing to the British authorities and raising money to support families who had lost their breadwinners to imprisonment.