Complex sentence: A replica of Trevithick's first full size steam road locomotive was first displayed at Camborne Trevithick Day 2001, the day chosen for the celebration of Trevithick's public demonstration of the use of high-pressure steam.
Split into simpler sentences: A replica of Trevithick's first full size steam road locomotive has been built. It was first displayed at Camborne Trevithick Day 2001, the day chosen for the celebration of Trevithick's public demonstration of the use of high-pressure steam.