Complex sentence: The letters "SPQR" can sometimes be seen displayed on London market trader's stalls, meaning "Small Profits, Quick Returns"; a reminder not only of their trading philosophy, but also of the Londoner's sense of humour.
Split into simpler sentences: The letters "SPQR" can sometimes be seen displayed on London market trader's stalls. In this instance it is alleged to stand for' Small Profits, Quick Returns', a reminder not only of their trading philosophy, but also of the Londoner's sense of humour.