Complex sentence: Arthur Simon Simpson (Peter Ustinov) is a lazy, middle-aged, small-time crook biding his time in Kavala, Greece where he accosts tourists at the harbour, selling them cheap souvenirs, and offering his services as a guide.
Split into simpler sentences: Arthur Simon Simpson (Peter Ustinov) is a lazy, middle-aged, small-time crook biding his time in Kavala, Greece. He works as a tout, accosting tourists at the harbour, selling them cheap souvenirs, and offering his services as a guide.